Get the latest build.
Passaggio is in active development and ships as an APK from GitHub Releases. Install over the existing app to keep your voice setup and progress.
How to install
Tap Download latest APK on your phone (or copy the file across from a computer).
Open the file. If asked, allow your browser or Files app to install unknown apps, then come back and tap Install.
Plug in headphones, open Passaggio, and let the trainer walk you through voice setup. Allow the microphone when asked — it's the only permission the app needs.
Play Protect may warn that the app is from an unknown developer. That's expected for a sideloaded build; choose Install anyway. Updates install over the top and keep your data.
Verify the file
Every APK on the Releases page lists its SHA-256 digest. On a computer you can check it with sha256sum passaggio-candidate-*.apk (or certutil -hashfile … SHA256 on Windows) and compare it to the one shown beside the file.