Bell Tower - Know the Time

How did people in the past know what time it is? The bell towers told them! (Or a grandfather clock or maybe a cuckoo clock.) Now you can have your android tell you the time by ringing a bell every 15 minutes and on the top of the hour. You'll always roughly know what time it is, or that it's getting late. This application can also use a cuckoo-clock sound or a few other sounds.