Thanks @Momantai.
There are a few things here, I’ll respond to them in turn.
First off, while the application is currently maintained and tested only on iPhone, we intend to extend it to support of iPad as soon as the most critical bugs that come up are fixed! I believe however that the behavior should be relatively similar. To tell the truth, I’ve added the automatic rotation because when I work on the app, the iPhone is plugged in with a cable and I found it more practical for me. It might be a good idea to let the user choose which orientation (left landscape/right landscape) suits them best, but it’s currently of lower priority to us than fixing the bugs. I’ll get my iPad from home and test the app on it anyway. What’s the iPad version you’re using? Mine is an iPad Air, first gen.
Small semi-technical explanation: the app did not initially rotate, but we had to add that because when the iPhone opens up the App Store dialog, it needs to be in Portrait, while all the application was designed in Landscape. We therefore retrofitted Portrait and forced autorotate for other screens. I’ll have a pass at the whole UI later today and check if I did not forget something egregious, as regards to rotation.
Calibration is now required in Simple Mode, and while not part of the mandatory process, is part of the tutorial in Advanced mode. It’s not necessary to calibrate when the application updates, but you need to do it when you update the Senstroke’ firmware. In any case, calibration should only improve the accuracy, and the first step (gyroscopic calibration) is very fast, so you can do it as often as you please.