To those of you who land on this page, this project is no longer maintained. I invite you to check out my Python transcriber web app instead.
This is a pitch detector for Android.
It uses the McLeod Pitch Method, adapted from TarsosDSP:
https://github.com/JorenSix/TarsosDSP
The repository is an Android Studio project.
To install the app, download it from the store links above, or download the app-release.apk file in app/ from this repo.