Please note that this app has been deprecated in favor of gStrings, which has recently been rewritten from scratch; with a multi-core optimized engine, improved fundamental frequency detection, smooth OpenGL graphics, a redesigned UX, and a simplistic/focused material UI.
(!!) NOTE: this application is free to download, but will only work for a limited amount of time before you will have to activate it through a small one-time in-app purchase fee (~3EUR). Besides giving you a chance to try the app before you buy it, this was also the only way (due to technical constraints of the Play Store) to be able to give away this app for free to all existing gStrings users with paid content.
The app measures sound pitch using your phone's microphone, letting you tune any musical instrument (violin, viola, violoncello, bass, guitar, ukulele, piano, even wind instruments to name a few that have been tested).
Features include:
1. orchestra tuning (shifting/redefining tone frequencies, e.g. A440 > A443),
2. different temperaments (pythagorean, bagpipe, etc.),
3. custom user-defined temperaments,
4. different note namings (English, Latin, Hindustani),
4. a nonlinear scale,
5. microphone sensitivity setup,
6. pitch pipe.If you were looking for a guitar tuner, try gStrings instead!Thank you note: most of the historic temperaments were included courtesy of NetCat AG.

// Option A //

To download Waves mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Waves mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Waves from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Waves in HappyMod App.