QeyeT Mail for Android.

The app is Android. Signed APK, in-app updates, same six recovery words. Install over the previous version so the vault stays on the phone.

Android

Signed APK with in-app updates. Install over the previous version. Do not uninstall if you already have Mail.

Download the current Mail APK (~73.2 MiB)
Allow install from browser if prompted
Recover with six words or create new

Download Android APK 0.57.87

Mail 0.57.87 (build 5787). Verified download
Size 59,904,660 bytes (~57.1 MiB). SHA-256
352d141107594748a5e2c30257a81eb1d28b67e9fa8591bdc2f8cc6cd31356b8

Second phone

On the first phone

Open Settings, then recovery words. Copy them offline. Never paste them into random websites.

On the new phone

Install the same APK. Choose "I already have Mail" and enter the six words in order.

Sync

Keep both online briefly so mail and chat catch up. Then use either phone.

Download Android APK 0.57.87