I'm always interested in apps onthe iPad or android devices that are related to the Arduino or electronics in general, in this case I took a look at Arduino pocket reference which fitted the bill as it was free.
The first thing that is obvious with a lot of the arduino apps is that they seem to have basicallt borrowed all of the creative commons content from the arduino website. With regards the content I had a quick flick through and found a couple of bugs or things that I think could have been better.
An LED example with no resistor connected to the output pin of the arduino – bad practice
Another LED example with 5 LEDs on the layout and 6 on the schematic
Inconsistent code fromatting – would prefer all code snipptes to be highlighted
Some of the layout images were incorrectly sized
I have linked to my video so you can have a quick look yourselves
Video
Store Link
https://itunes.apple.com/us/app/arduino-pocket-reference/id969849288?mt=8