A free app for Android, by Julian Handwerker.
The best part about the MinchaMinder app is that it's absolutely free.
Once you download the app and create an account, you're ready to go. You can track your prayer times and set an alarm to remind you to pray. The alarm will wake you up and get you going to shul or daven in the right direction.
The app also has a built-in compass to help you know which way to face during the prayer. It also supports the Great Circle (geodesic), Rhumb Line (Loxodrome), and Due East methods.
The app is very easy to use and supports multiple languages. You can use it in English, Spanish, French, Portuguese, Russian, and many more.
