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Get Frequency Generator old version APK for Android
It's an awesome sound frequency generation app!
This frequency generator allows you to generate sine, square, sawtooth, or triangle waves in the 50HZ to 16000 HZ range. The app is easy to use. It can probably be used for multiple purposes, such as dog whistle, noise maker, tinnitus relief, relaxation or meditation, or just annoying your friends.
Let me know what extra features you would like to see added!