I suffered the free version for too long, refusing to buy it because if I left the app open, it would consistently drain my battery all day. The FINALLY fixed that in an update, while at the same time making it so that I would have to recreate the timer EVERY time - many many steps to do so. I finally paid for it (hoping theyd stop pestering me to rate this app), but since they didnt here you go. One star, because its unreliable, and therefore worthless. Randomly, and far too often, but for no reason I can discern, the timer will NOT beep signaling the end of the cycle. YES I have checked the timer settings, and beeps are turned on. I cant rely on this app to signal me when it should. It is therefore worthless. Wish I never paid for it and looked for a different solution for my needs.