Air Display by Avatron

28 11 2013

AirDisplay by Avatron Software Inc., USA, transfers the screen content of a Mac or a Windows PC to the iPad or the iPhone if computer and iOS device are within the same WiFi network. Either it’s used as an extension to the computer’s screen showing windows which are dragged into an invisible area on the computer or just control the computer via the touchscreen of the iOS device.

Installation …

There is an iOS app (paid version) and a desktop companion app (free) which have to be installed the devices. Once the app is launched on both devices the screen content of your computer is transferred to your iOS device.


Controlling the computer can be easily done by just tapping on controls. The menu of Air Display on the computer allows to select the iOS device on which the computer’s screen is shown.

Applications …

AirDisplay can be effectively used for

  • GTD
    Filling your iPad screen with your utility apps, like iChat, Mail, iCal, and Calculator
    Initiating or controlling tasks on your computer while sitting in another room
  • Business
    Moving your iWork and Office tool palettes and inspector windows onto the iPad, and let your document fill the screen.
  • Office
    Carrying an extra monitor down the hall to a meeting.
    Helping a colleague without leaving the room by looking on his screen.


  • Presentation
    Retrieving some information from a computer while sitting in a conference room.
    If you want the information to be shared with an audience this can be done by connecting the iPad to a beamer with Apple’s Digital AV Adapter.


  • Administration
    Copying a locally saved document to a network storage to make it available for colleagues.
  • Writing a short note on the local workstation.


  • Medicine
    Let a patient or family member watch a procedure on a wireless video monitor.
  • Real estate or Sales
    Hand a client a mirrored display while you work at the laptop.
  • Programming
    Use the extra display area for such auxiliary development tools as Console, Terminal, and the Debugger.
  • Music
    Use your iPad as the ultimate control surface for Logic or Pro Tools.

AirDisplay 2 …

In November 2013 Avatron released AirDisplay 2 (which is quite expensive but worth buying) with these added features:

  • AirDisplay 2 now connects up to 4 iPads simultaneously to create unique presentations you drive from your Mac to start training sessions or presentations.
    This multi-client support will also be available for Windows in the near future.
  • New streamlined and iOS 7-ready interface
  • Improved performance

Summary …

AirDisplay is a useful tool for establishing ad-hoc connections to computers within the same WiFi network. The mobility within an office is no longer restricted when using AirDisplay on an iPad.

Your desktop is always with you.

Other products of this reliable company continuously updating it’s products are Air Login, Air Sharing, and Print Sharing. See my review of Air Sharing below.

Related links …

Presentation, Presenting with iPad (1)

Air Sharing, iWebDAV Connection

Remote Control, TeamViewer

Remote Control, AirLogin

Thanks for taking my blog into your viewing screen.

Speed Test

25 08 2013

Nature with it’s electromagnetic waves traveling with the speed of light helps us to retrieve information from the internet pretty fast even if the way data is taking is by far not the shortest possible.

Using a link from within an app a website opens after about 3 sec including the opening of Safari browser. It’s quite fast compared to a bus, a car, a high speed train, or even an aircraft.

The speed of light …

If there is a cellular connection to the Internet data can be transmitted without using a medium in contrast to sound which needs the air or the earth to propagate and to transmit information like the cry ‘Help, help’.

Electromagnetic waves transfer data in vacuum at the speed of light. None of Apple’s innovative techniques can make it faster. It’s a law of nature (a universal physical constant) found out by

Ole Rømer first demonstrated in 1676 that light travelled at a finite speed (as opposed to instantaneously) by studying the apparent motion of Jupiter’s moon Io. In 1865, James Clerk Maxwell proposed that light was an electromagnetic wave, and therefore travelled at the speed c appearing in his theory of electromagnetism. In 1905, Albert Einstein postulated that the speed of light with respect to any inertial frame is independent of the motion of the light source, and explored the consequences of that postulate by deriving the special theory of relativity and showing that the parameter c had relevance outside of the context of light and electromagnetism. After centuries of increasingly precise measurements, in 1975 the speed of light was known to be 299,792,458 m/s with a measurement uncertainty of 4 parts per billion. In 1983, the metre was redefined in the International System of Units (SI) as the distance travelled by light in vacuum in 1/299,792,458 of a second. As a result, the numerical value of c in metres per second is now fixed exactly by the definition of the metre.

Within media like cables it’s slightly slower, about 90 km/second (324,000 km/h or 201,324 miles/h).

With the speed of light you would need

From geostationary sattelite to earth 119 ms
From Sun to Earth 8.3 min
Across the Milky Way 100,000 years

And from Cupertino (Apple’s Headquarter) to Cologne in Germany?
Well that’s a problem. The app Google Maps showed me neither the way nor the distance. But there is a more severe problem: Light propagates linear. So a light beam would’t go the way to Cologne.

Internet connection …

If you connect your device to the Internet data is transferred via a couple of stations.

With the app Nice Trace the way the data takes from source (the server where you get the data from) to destination (your iPhone or iPad) can be reported.

This is the way my website is transferred to my device.


Measuring the speed …

I want to compare the apps

SpeedTest by Ookla, USA

Speed Test by Russian Internet Solutions LLC

cnLab Speed by cnLab AG Swiss


My home configuration is a Cable Internet Connection from German provider UNITYMEDIA with a Cisco Modem and Apple’s router AirPort Extreme working on 802.11 a/b/g/n standard in the 5 GHz band. The device was an iPad 3rd Gen.

To eliminate ups and downs of the data transfer speed I measured the transfer rate for downloads under the following conditions:

50 repeated measurements
every day for one month at 8 am, 1 pm, and 9 pm

The apps used different test servers.

To compare the results I calculated the mean value of all measurements for each app.

Do the measured values come close to the everyday usage of your device with all the ups and downs of the internet connection?

Yes, they do.

Here is the result of using the app FTP Client PRO by Anders Havn with which I downloaded a file of 305 MB file size under the same conditions described above.


Here are mean values of all the results I took over a period of one month:


An alternate app …

If you are interested in an app which combines speed test with network analysis try

Net Analyzer by Jiri Techet

This perfect universal All-In-One app gives you all informations about a network including standard tools such as ping, traceroute, port scanner, whois, and beyond providing geolocation for all discovered servers.

Additionally I was impressed of Jiri’s perfect website for mobiles.

See this gallery to get an overview of the features:

This slideshow requires JavaScript.

Summary …

The results of all apps are within +-4.5 %. Differences may be caused by the different test servers used during measurements. All apps do what they are intended to do but cover just one functionality except Net Analyzer by Jiri Techet.

Thanks for visiting

Network (3) Port Forwarding

25 04 2013

Parts (1) and (2) of my articles about networks gave you some basic knowledge about networks and discussed the possibility to connect from the LAN to the WAN or in other words from the devices at home to the webservers in the outer world.

The reverse way, connecting from WAN to LAN, is basically not possible. Only in case of requests from a device within the LAN data goes the reverse way, e.g. entering an URL like as the request and getting the answer (the website content) delivered by servers.

The main reasons why a WAN-LAN connection won’t work:

  • 1 Most of the ISPs (Internet Service Providers) assign varying IP addresses to your connection so that it is not possible to keep a stable connection over the time.
  • 2 For security reasons nobody should be able to compromise your LAN.
    So a Firewall/Router will not accept incoming requests which were not initiated by a device within the LAN.


The solution is Port Forwarding an applications communication with another application.

Dynamic DNS …

The first problem of varying WAN IPs can be solved by using a service called Dynamic DNS (DDNS). Some companies offer this service without charging.

For example you can register at After completing the registration process you can define a hostname and download the so-called DUC software (Dynamic Update Client) which has to be installed on the computer you want to connect to.


The main idea is to get a HOSTNAME which can be used instead of the varying WAN IP. The DUC client on the computer inside the LAN frequently determines the actual WAN IP and transmits the result to the DDNS provider. Your request from outside your LAN first is transmitted to your DDNS provider via the HOSTNAME. DDNS returns the actual WAN IP of your LAN and a connection can be established.

So DYNAMIC DNS SERVICE provides a constant ALIAS for a varying WAN IP of your LAN.

Opening the firewall …

You already know that data on the Internet is sent to and from IP addresses. Sending or receiving data is done on ports. Ports are virtual pathways on which Internet data flows.

For a Watchguard SOHO Firewall a custom service has to be defined and the related traffic has to be allowed. The service must include the definition of an IP of the computer you want to connect to as well as the port for communication.


While things may differ slightly depending on your Firewall’s/Router’s firmware, the below mentioned fields are pretty standard:

  • Application or Service Name
    The name of the application you’re forwarding this port for. You can use any descriptive text you want—this field is here to help you remember why you set this up; like the name suggests, you normally want to use the name of the application you’re setting up port forwarding for. I’s a good idea to also include the computer’s name along with the service if port forwarding is used for the same applications on different computers.
  • Port to
    ‘Port to’ is the port on your local IP address. If you were setting up VNC for a local computer, you’d fill this in with 5900 as that’s the standard port number for VNC services.
  • Port from
    ‘Port from’ is the port on your external IP address. Generally you use the same port as entered in ‘Port to. This works just fine when you’re configuring only one machine for one type of service. But say you wanted to be able to remotely access two or more computers using VNC. If you used 5900 on a single, external IP address they would be in conflict. The router would see a request for port 5900 and not know which Local IP address should handle that request since the port forwarding table has two. To solve this problem, you can use the standard port for one and not for the other—kind of like an apartment building has a single address but multiple apartments. You can use port 5900 for one and 5901 for the other computer. In that case you have to first set the port (the computer you want to access) when using VNC on an external IP address. This way you can set up identical services with a single External IP and different Local IPs without conflicts.
  • Protocol
    This is where you specify whether or not your service uses the TCP protocol, UDP protocol, or both. When you look up your ports you’ll also want to make note of the protocols used. In most cases it will just be TCP.
  • IP Address or Service Host
    This is where you specify the LAN IP of the computer you want to access. You can easily find this information in your computer’s network settings. The IP address will generally be in the 10.0.x.x, 192.168.x.x, or 172.31.x.x format. Because these IP address are generally dynamic (changing over the time), you have to set up static IPs or so-called DHCP reservations.
  • Enable
    You need to enable the port forwarding rule (on Watchguard routers you do it by setting the rule to ALLOW). By using DENY you are able to save the rule but it won’t be active or function in any way.

The firewall is now opened for authorized incoming traffic to a specific computer using a specific port.

The communication is done by the VNC Server software which can be downloaded from the RealVNC website.

After installing the DUC client software from No-Ip and the VNC server software from RealVNC on your PC it looks like this:


VNC viewer on an iOS device …

To configure the VNC Viewer app on an iOS device you just have to enter the HOSTNAME, the PORT for communication and the credentials you defined in the VNC Server software on your computer.


Summary …

The connection to a computer inside a LAN from an iOS device outside the LAN works with a

  • Dynamic DNS account and an Update Client (DUC)
  • Configuration of the firewall for a specific computer and a specific communication port
  • Server software (VNC Server) on the computer
  • Client software (VNC Viewer) on the iOS device

In a typical small office environment, a router assigns private network addresses to internal computers while the router gets a public IP from the ISP.
If the public IP is not static, Dynamic DNS services must be used to configure the VNC Client
by using the Dynamic DNS address instead of an IP address.

Connection to a computer in the LAN requires an installation of VNC Server software.
A unique port number must be assigned to each computer that should be reached from outside the LAN.

Useful links …

Former articles about networks

Network (2) Apple Airport Router

Network (1) Addressing

If you want to use Port Forwarding you should visit

Port Forwarding VNC on Apple Airport

You will find the settings for many Soft- and Hardware products as well as a software product called PFConfig which supports automatic configuration (29.29$).

iWebDAV connection

2 04 2013

There are lots of utilities connecting an iOS device with cloud services like Dopbox, iDrive or Google Drive. But Usually these apps cannot connect two iOS devices like an iPhone and an iPad.

Avatron Software Inc., USA offers an app where two iOS devices can be connected via WebDAV with some additional benefits like connecting to cloud services and displaying many well-known file formats. It’s called Air Sharing.

See my blog

WebDAV Basics
WebDAV (Web-based Distributed Authoring and Versioning) is a method that allows you to edit and manage files stored on remote servers. The comnection is based on the HTTP-protocol with extensions like creating folders and deleting files on the remote device.

for more information about this topic.

The features of Air Sharing …

Remote File Servers

Google Docs
MobileMe iDisk
FilesAnywhere (WebAdvanced account)
Other WebDAV servers
WebDAV over secure HTTPS connection when available
SSH (sftp)
Access email attachments (POP3 and IMAP servers)
View documents directly (automatic local cache)
No Wi-Fi required

File Sharing

Auto-detects other users on same Wi-Fi network
Connects to Air Sharing on another device

File operations

Save images to Photos
Browse zip archives without unzipping
Delete, New Folder
Email attachments
Move, Copy, Paste, Duplicate
Get images from Photos
Download from URL (copy link in Safari, paste into Air Sharing Pro or HD
Zip (supports password-protected archives)
Print documents

Document formats

iWork (Pages, Numbers, Keynote)
Microsoft Office (Word, Excel, and PowerPoint), subject to iOS compatibility
Web archives (web pages downloaded by Safari)
HTML web page
RTF (Rich Text Format) and RTFD (with embedded images)
Plain text (many file extensions) with auto-detection of character encoding
Source code (C/C++, Objective C/C++, C#, Java, JavaScript, XML, shell scripts, Perl, Ruby, Python, and more) with syntax color-coding
Movies, audio, and images (standard iOS formats)
PDF (even password-protected, with Search, table of contents, thumbnails, Go To Page

I agree to the developers announcement: These are tons of features.

An application …

Let’s see how it works, when connecting two iOS devices within the same WiFi network and transferring a document from Apple’s iWork suite from an iPhone to an iPad.

Consider the following situation.
You want to directly transfer a spreadsheet created with Apple’s Numbers to a colleague. The more complicated way would be to save the document on a cloud storage and share it with him by E-Mail. Keep in mind that iCloud doesn’t support direct sharing as it only syncs files across devices with the same Apple ID. The Apple ID personalizes the storage and hence a direct transfer between two iCloud accounts is not supported.

Establishing the connection …

Open Air Sharing on both devices.
The app will automatically connect the two devices using Apple’s Bonjour networking services.

Bonjour is Apple’s implementation of Zero configuration networking (Zeroconf), a group of technologies that includes service discovery, address assignment, and hostname resolution. Bonjour locates devices such as printers, other computers, and the services that those devices offer on a local networking.

Using the Bonjour identification is convenient because it’s independent of the varying IP-Address you automatically get when connecting to a WiFi network.

If Bonjour is not available …
To establish a connection without Bonjour from iPhone to iPad you have to configure a WebDAV connection. Within Air Sharing app tap on ‘+’, select ‘Other WebDAV’ and enter the required data. To identify the remote device you must use it’s IP-Address.

Both, IP-Address and Bonjour-Name are displayed on the remote device when tapping on the WiFi icon.


Transferring files …


What you see on the screens …


Reading PDFs …


Summary …

4 stars for a sophisticated app. You may find the missing star in deep space. It’s name is SMB!

A special feature I found very useful is mailing a whole folder. Avatron’s app automatically creates a ZIP-File and opens the mail client.

Thanks for reading my blog.
I appreciate your comments.

Device To Device Transfer

10 03 2013

Why should I transfer my data over thousands of miles using an internet connection although my devices are only a couple of inch apart!

Normally nobody takes care of an efficient transfer method but sometimes there is no WiFi or Cellular connection. In this case you cannot transfer data from one iOS device to another except you use iTunes on your computer. That’s certainly not comfortable.

Connections between two devices in general can be established via WiFi, an internet connection (e.g. syncing via iCloud) or a connection method called Bluetooth (henceforth referred to as BT).

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecom vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

While most people think of BT as the way that wireless earpieces get connect to phones, it’s actually a more general purpose technology that allows many kinds of devices to be used.

This post will give you some detailed information about BT and its application from within BT capable apps.

Turning on Bluetooth …

Complete this procedure to connect with accessories for iPad/iPhone e.g. BT Keyboard or BT Headset:

The process of connecting a BT device to an iPhone is called PAIRING. Regardless of what kind of device you’re pairing to your iPhone, the process is basically the same. Follow these steps to complete the iPhone/iPad BT pairing process.

Begin by making sure your iPhone and BT device are near each other. BT signals can only extend a few feet.
Next, put the BT device you want to pair with the iPhone in discoverable mode. This allows the iPhone to see the device and connect to it. Making a device discoverable requires different steps on different devices. For some it’s as easy as turning them on, for check the manual.
Go to Settings, tap BT and turn it on. A list of all the discoverable BT devices will appear.
If the device you want to pair with is listed, tap it.
To pair some BT devices with the iPhone, you need to enter a passcode. If the device you’re trying to pair is one of those, the passcode screen will appear. Consult the device’s manual for the passcode and enter it.

Keep in mind that BT is a short-range connection (distances up to 164 feet/50 meters) and will be lost if you move the connected devices too far apart.

While BT doesn’t drain as much battery as Wi-Fi, keep it turned off when not in use.

Using Bluetooth …

You cannot pair iPhone and iPad.
Nevertheless BT can be used for the ‘Personal Hotspot‘ feature for providing an internet connection for iPad via the cellular connection of an iPhone or vice versa.

Even if you could pair these devices you wouldn’t have any benefit because there are no apps provided by Apple (Photos, iWork, iMovie, Calendar, etc.) which support data transfer via BT.
I may be wrong but that could be the reason why pairing of two iOS devices makes no sense from Apple’s point of view. Anyway, a programming interface is available so that app developers are able to support BT if needed.

Applications using BT …

These apps for example support BT:

Safety P+V (Photos management)
Safety Notes (Notes management)
Phone Drive (File Management)
Wireless Drive (File Management)

How it works …

Let’s have a look on Safety P+V by 83Technology, an app with a perfect UI.
This app is for managing photos and videos in folders which can be created by the user. You additionally may define a password to secure the data. Further features are:
transfer photos from and to the camera roll
move photos and videos from one folder to another
print photos and open them in another app

Here is a description how to transfer photos or videos between two iOS devices.

On both devices WiFi is turned OFF and BT is turned ON.
The devices must NOT BE PAIRED.

  • Open open SAFETY P+V on both devices.
  • Tap the Sync icon on the device which is the sender.
  • Select iOS Wi-Fi / Bluetooth Transfer. The other device is then listed under ‘Devices nearby’.
  • Select the objects you want to transfer and tap on Send.


The selected files are transferred into the ‘Image Sharing’ folder from where you can move them into other folders.

Other apps supporting BT …

There are some other apps available in Apple’s App Store supporting a BT connection between two iOS devices. But on my point of view all these apps make no sense.
Why? Consider the following situation:

You want to transfer an iWork document to another device.
If an internet connection is available the best way is to use iCloud as the documents are synced automatically. If there is no Internet and no WiFi connection available you have to firstly transfer the document to the local folder of the BT supporting app via ‘Open In’. Then the file must be transferred from the BT supporting apps local folder via ‘Open In’ to the iWork app.


Summary …

BT is a reliable, powerful, fast and secure wireless technology for data transfer with minimized power consumption. Apple’s BT implementation on iOS devices is mostly incompatible with smartphones or tablets from other vendors.
For some inexplicable reason it’s not available as a standard feature for data transfer between iOS devices.

Thanks for reading my post.

Push and Pull

27 02 2013

We are not talking about pull-down menus or push-up bras.

This blog is about the technology to immediately transfer information to a recipient (Push) or to get information by asking if there are any news available (Pull).

What is Push and Pull?

The Post office is the active part and delivers the mail when there are new letters.
Getting a phone call and the daily newspaper are examples for the Push technology’s well.
In all situations you subscribed to something.

You are the active part when going to the post office and looking for new letters in your post office box. This generates more ‘traffic’ and so it’s not as efficient as the Push procedure.
I there is nothing new you flogged a dead horse.

Further examples of the Pull technology are browsing the web, where you ask via Google Search Engine and get the answer from a Web server which displays the site you were looking for.
No subscription is required to use the Pull technology. Unlike buying a newspaper at the kiosk your mobile device has to identify itself to get the requested information. This is done by your provider in connection with your SIM card.


Some of your iPhone apps are more pushy than others, and often you’d like them to stay that way. These apps take advantage of Apple’s push notification service to send you badges, sounds and alerts. However, too many notices from too many apps can get distracting, even annoying.
Push notifications of apps can be set up individually or collectively using SETTINGS of your device.

What does your device do?


Deactivate all push notifications …

Go to Settings – Notifications and turn off ‘Scheduled’.
Set suitable options for ‘Allow Calls From’ and ‘Repeated Calls’
Then go back to Settings and turn on ‘Do not disturb’.

Deactivate all push notifications for an app …

To completely turn off push notifications just turn off everything you just listed for that particular app: badges, banners, sounds, and whether the app appears in the ‘Notification Center’.

Not every app has to keep a connection open to some server, but there is one central connection that is kept alive for all push notifications for all apps.

In other words:
If you turn push off for an app that doesn’t receive any, there will be no change in battery life whatsoever. The easy way to know which push notifications are sucking your battery life, just look at what you’re receiving more often during the day. If you receive a Twitter notification every 5 minutes, all day long, the screen will always have to turn itself on to show it to you. This adds up usage minutes and drains battery power.

E-Mail …

Got to Settings – Mail, Contacts, Calendars – Fetch New Data.
If you turn on ‘Push’ you will get E-Mail immediately after your provider received a message for you. If you turn off ‘Push’ the timeframe below will be valid and uses the PULL technology that means, your device asks your provider whether there is anything new for you.

The battery life …

I found many articles saying that the battery life decreases rapidly when turning on push notifications. I started a test with 5 E-Mail accounts and activated notifications for Twitter, Facebook, LinkedIn, Google+, iMessage,, Quora, StumbleUpon, 4 forums via Tapatalk and the German sending messages nearly every 20 minutes.

Measuring the battery capacity on a normal day with Push and on another day without Push my impression was that there is no significant difference. This is admittedly subjective as I am not able to set laboratory conditions. 3-5% more or less battery power is marginal compared to the other 70 to 80% the iPhone consumes while doing other things.

If you want to save energy you must deactivate all settings which make the device to a smartphone and you better move over to a 20$ mobile phone.

You can find many suggestions about using push or pull to keep your battery alive for a longer time. All these discussions are for the trash, because the energy consumption depends on
how many notifications you get on an average and how Push is implemented in the different applications. Setting up Push requires to keep at least one connection alive all the time. Otherwise the pushing party would contact the nirvana. If there are less notifications it’s recommended to use Push technology because keeping a connection alive does not drain your power significant.

Pull technology is recommended for users who want to decide themselves what and what time he wants to really use the information. It’s monkey business to receive all the informations even if you have no time to read them.

So decide for yourself whether using Push or Pull.

My personal recommendation is, pull the information you want at a time you want and on an amount you want and don’t let the aliens give the beat. You only read your E-Mails when you are in a position to and have the time. Doing a manual download takes seconds and information can be read then or at your leisure.

Reducing energy consumption …

Here are some suggestions to reduce energy consumption when using Apple’s new operating system iOS 7.


The history …

The Apple Push Notification Service is a service created by Apple Inc. that was launched together with iOS 3.0 on June 17, 2009. It uses push technology through a constantly open IP connection to forward notifications from the servers of third party applications to the Apple devices.
Scott Forstall stated that push notifications were a better means to maintain battery life than background processes (which are used for pull technology) as far as receiving notifications are concerned.

A more technical view …

Apple Push Service Protocol

Thanks for dropping by.

Cloud Providers for iOS Devices

22 02 2013

There is a rapidly increasing number of Cloud-Providers. You have to decide which fits best. Otherwise your data will be spread over the world and its hard to find out where they are.

I checked free accounts of 12 providers and their usability on Apple’s iOS-Devices as well as their PC-Client versions since more than one year. This article describes my experiences with all the free offers.

Summary of the main test criteria:

1 iOS-Client-Software available

  • to display the frequently used file formats like PDF, TXT, CSV, XLSX, DOCX, iWork-Format (.numbers, .keynote, .pages)
  • to manage files and folders
  • to get links for sharing files
  • to share multiple files via a single link

2 PC-Client-Software available

  • to permanently sync local folders on Mac/PC with cloud folders
  • to set up the sync direction (two way or one way syncing)

3 Encrypted transfer of data between local device and cloud storage

  • to avoid the usage of special apps for encryption like BoxCryptor for Dropbox
  • to securely manage data in transit (while transmitted between the provider and the device) and at rest on the cloud storage

4 Amount of free space

  • should not be less than 5 GB
  • reasonable prices for account updates to higher capacities

5 WebDAV-Support

  • to set up an additional connection other than the native provider’s native app via administrative tools like USB Drive, GoodReader, ReaddleDocs, …
  • to assign shares to a drive letter on a PC and work with this ressources within any application (e.g. saving documents from iWork directly to the cloud

6 Performance, Activity, Usability

  • immediate syncing with high performance
  • plain activity indicators on Mac/PC for sending and receiving files on Mac/PC
  • available context menu on the Mac/PC icon with all necessary functions for accessing local sync folders, preferences, recently updated files, etc.

7 History

  • availability of a file history
  • availability of restoring deleted files from the trash within a reasonable timeframe

Main facts …

Cloud Free WebDAV Encrypt Syncing
iDrive 10 GB yes no multiple, selectable folders
Dropbox 2 GB no no one folder+subfolders

iDriveSync and Dropbox provide powerful apps for Mac/PC as well as iOS devices.

Dropbox and iDriveSync sharing options on iOS devices are:
E-Mail, Message, Facebook Message, Post to Facebook, Tweet

A special functionality of Dropbox is the ‘Camera Upload’ which uploads every photo you made with your camera on an iOS device.

Both providers do not support encryption in transit.
If the provider is compromised your data will be unsafe.
Except WUALA (CH) no provider fulfills the necessary requirements for safe transfer and storage.
Admittedly cloud providers ensure encryption but the Terms and Conditions of nearly all providers authorize them to review the data or pass them to authorities on demand.

Dropbox currently does not support WebDAV whereas iDrive does. That must not be a disadvantage because the PC-Clients support convenient syncing with local folders and most of the iOS-Tools (like USB Disk, GoodReader, Documents, …) support direct access to the storage of well-known providers.

If using the iWork suite intensively Dropbox is not the best candidate as there is no support for WebDAV. If iCloud syncing for iWork is turned on (Settings – iCloud – Documents + Data) they are admittedly transferred to other iOS devices but only those using the same Apple ID. So sharing is only supported by mailing the document as an attachment.

iDriveSync supports WebDAV and therefore can be configured in iWork using the ‘Copy to WebDAV’ feature. What you have to do is to enter the server address (, your credentials and to share the iDriveSync folder with your colleagues.

Both iOS apps support the display of the above mentioned file types except CSV files.

Another benefit of iDriveSync vs. Dropbox is the pricing (1.38 $ /50 GB/y vs. 3.75 $ /50 GB/y).

So the overall winner is iDriveSync.

Useful links …

Sharing Multiple Files on iDriveSync

Costs of Cloud Storages

Risky Free Clouds

Which Cloud Provider fits best

Some impressions of the UI …


Remote Control with iPad

30 01 2013

There is much more sector-specific software available for computers running on Windows than on Macs.
Windows based software cannot be installed on iOS-Devices. But there are several options for using it on an iOS-Device.

You just have to connect both devices with the help of connection software which establishes a secure connection between the devices via internet.

I took a glimpse at the free app versions of these competitors:

An important criterion for fast and easy usage are the extensions to iPad’s default keyboard.




What you should expect from connection software …

  • Encryption for remote usage and file transfer
  • Support for different platforms
    (Mac, Windows, Linux, VNC + RDP Servers)
  • File transfer from and to the remote computer
  • Support for iOS dictation
  • Bluetooth keyboard support
  • A well designed keyboard for all the additional keys which are by default not available on iOS-Devices e.g. F1, Esc, Ctrl etc..
  • Optional control via Touchscreen or Mouse pointer
  • Support of combined keystrokes like or Ctrl+Alt-Del
  • Rebooting the connected computer and establishing a new connection automatically
  • Wake-On-Lan support

About the usage …
Remote-controlled working with iPad is not recommended for intense working. But it is a fast and comfortable way to control and manage tasks and to support colleagues without the need of using a laptop. It can be done from anywhere and anytime.


Auditors evaluate mainly enterprises regarding their accounting and internal auditing (risk management, corporate governance, etc.). Mostly away from the office a connection to special software products is indispensable. So iPad with its Retina display is the perfect mobile device to do the job as it more than offsets larger displays.

Summary …

The winner is TeamViewer because of

  • Zero-Configuration except fixing a password
  • Performance
  • Stability of the connection
  • Clear and customizable outline of connections
  • Overview of current connections, partners and menu for connection functionalities
  • Support for copying photos directly from the camera roll to your remote computer

Thanks for flying with
I hope you will come back soon.

Lost WLAN-Connection

13 11 2012

There is still something going wrong with the WLAN-Connection under iOS 6.0.1 update from 2012-11-01.

Configuration …

  • iPhone 4 S with iOS 6.0.1
  • Cellular data turned on
  • WLAN turned on
  • Apple Airport Extreme Router
  • PPPoE-Connection from APE to DSL-Provider


Symptoms …

  • iPhone 4S does not connect to WLAN
  • iPhone 4S looses WLAN-Connection and switches to Cellular Data -Connection
  • After rebooting the device it connects to WLAN or sometimes does not
  • In rare cases the device connects to WLAN after turning off and on WLAN

Solution …

  • Go to Settings… WLAN… and choose your WLAN
  • Tap the blue arrow to set up the properties
  • Set HTTP-Proxy from OFF to AUTOMATIC

Additional information …

Lacks of iWork

24 10 2012

There are some lacks in Apple’s iWork-Suite.
Consider the following situation.


It is not possible to store the document directly on a USB-Stick attached to an Apple Airport-Router. That does not go together with Apple’s aspiration to ensure highly integrated connectivity.

A possible, but not convenient scenario is …

  • Select the document.
  • Select ‘Open in …’ from the menu.
  • Select an app, which can establish a connection to Airport attached storages.

These are for example …

App Developer
Files Connect Antecea
File Browser Stratospherix
GoodReader Goodiware

Another deficit of iWork is …
You cannot send more than one document via E-Mail.
Sorry, I have no simple way of doing it. Even the following scenario did not work:

  • Tap on ‘Send as E-Mail’.
  • Copy the attachment to clipboard.
  • Click on ‘Cancel’ and do not delete the draft.
  • Create a new E-Mail for another document.
  • Insert the first attachment from the clipboard.
  • This looks good, but unfortunately doesn’t work.

If somebody receives this E-Mail he won’t have access to the first attachment.


I think all of you agree with me …
There is still some work for Apple to make iPad ready for business use.


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