good idea but needs improvement

The idea itself is good, but unfortunately is what the button does not always properly. Kurtz sometimes opens the wrong app. Especially if you had the plug removed once and then inserting again. The programming is retained yes. What's more, I was able to start the phone directly with deactivated display by pressing the click button. That's a No, because then I have to expect that in your pocket suddenly the phone with an app turns on without I notice it. Perhaps the click button reacts differently even in some phone's. Can not I check was just one thing.
What also bothers me a bit is that is the associated app in English only. If multilingual better. The design of the app is simple but so that you find yourself still cope.

In short, a need for improvement.