Great app to keep focused but too many glitches as you can tell from other reviews. For me it has crashed in the passed. Currently the problem is that the vibration alarm doesn't come on when I'm done my timer, so it's literally failing at it's secondary job, to keep time of your session (1st job is to keep your phone away from you during your study session). Because of the glitch, I have missed a bus a couple times b/c the timer didn't ring. I am displeased. Also the new updates seem unoriginal