Tap BPM is a free Android application developed by Andrew Schwebach that measures the Beats Per Minute (BPM) of any song. The app is designed for music enthusiasts and professionals who want to keep track of the tempo of their music.

The interface of the app is simple and user-friendly. Simply tap anywhere on the screen to start recording the BPM of the song. The app displays the BPM reading on the screen in real-time. The text color of the BPM reading progresses from red to green to indicate the accuracy of the BPM reading. The app is accurate and can measure BPM within 1-2 beats per minute.

Overall, Tap BPM is a useful app for musicians and DJs who want to keep track of the tempo of their music. The app is free and easy to use, making it a great addition to any musician's toolkit.