Four Beat Tempo is a simple, ad-free app to convert the time between taps into beats per minute. All you have to do is to tap the beat four times for the tempo to display on the screen. Simple, huh?
This is one of the first Android apps I have developed. Although this was used as a means to learn Android development, I plan to meet Google Play's quality standards and maintain this app. Therefore, if you have any issues with the app, feel free to contact me.
This app is also open source and available on GitHub: http://github.com/kz/four-beat-tempo