Have you ever received that instruction from your eye doctor telling you to put a drop in your eye then wait 2 minutes with your eyes shut? Hard to tell the time.
Download this app, change your settings within your phones settings up under "EyeDropTimer", then open the app, put the drop in your eye and tap anywhere on the screen! The app provide audio feedback (unless on silent).
After the specified number of minutes you will receive an alarm. If you have the rest timer on automatic it will immediately start counting down the break (until your next drop is ready! Genial!