Download the app.

Your browser asks whether to keep the file

Chrome may say "This type of file can harm your device" and offer Cancel or Download anyway. That message appears for every APK ever downloaded, safe or not — it is about the file type, not this file. Choose to keep it, then verify the checksum above before you open it.

Android asks for permission to install unknown apps

Tap the downloaded file. Android will say something like "For your security, your phone is not allowed to install unknown apps from this source", with a Settings button. Tap Settings and turn on Allow from this source for the app you downloaded with — usually Chrome or Files.

This grants the permission to that browser, not to us. It is worth turning it back off afterwards.

Play Protect may say the app is unsafe or unrecognised

Google scans apps installed from outside the Play Store. It commonly shows "Unsafe app blocked" or "App scan recommended" for any app it has not seen before, which includes every new APK from every developer. Tap More details, then Install anyway.

We are telling you to click past a security warning, so you should hold us to the checksum above. That is the whole point of publishing it: it is the part of this process you can verify yourself instead of taking our word for it.

The install screen

Tap Install, wait a few seconds, and open the app. There is no separate setup step — you land on the account screen.

Updates

There is no store to push updates, so the app checks for a new version itself and tells you when one is available. [TO BE COMPLETED: CONFIRM SELF-UPDATE BEHAVIOUR IN THE SHIPPING BUILD] Every update is published here too, with its own checksum.