Android: We've discussed a few great timers for Android, but Ovo Timer caught our eye because it's simple to use, visually impressive, and perhaps most importantly, completely free. Open the app, drag your finger around the screen to set the countdown timer, and when you let go, the timer will start. When it's finished, the alarm will sound, letting you know it's time to check the oven, take a break from working, or get off the treadmill. More »