- No ads or weird permissions
- Doesn't just play looped samples
- Relatively power-efficient
- Able to keep playing in the background
- Contains math
- Optional "amplitude wave" mode
- Code is open source (GPLv3 license)
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Recently changed in this version:
2.0: Modernized the interface using the Holo theme and an ActionBar.
2.1: Added a "Lock Input" feature.
2.2: Fixed minor issues with the ActionBar icons.