At first I did not know that a bar code is included for an app on the packaging (funkey) and had the backing gates "Pressy" by Lever switch - looking apps. And I got to like the nimble, good support this Amazon suppliers know. As most useful app I found KeyCut. Funkey allowed only 4 key functions (3 for short-Press, 1x long), KeyCut 12 (9 for short, 3 for long). The short press functions are easy, but long yields conflicts with SVoice that are apparently the cause of some disappointing reviews here and also occur with other apps (including funkey). I have occupied S4 5 short Tipper with my Galaxy. 1 click starts directly into the camera, even from sleep mode, 2x the flashlight, etc. Overall, a nice touch with a good, inexpensive product