KeePassDX

KeePassDX is a lightweight password safe and manager for Android that lets you edit encrypted data in a single KeePass file and fill in forms securely. Rather than reusing one credential everywhere, you keep all your passwords in one local database, locked with a master key and/or a keyfile so you only have to remember one master password.

The database is encrypted with established algorithms, supporting .kdb and .kdbx files from version 1 to 4 using AES, Twofish, ChaCha20, and Argon2. KeePassDX adds passkeys with local storage of private keys, biometric unlock via fingerprint or face, and HOTP and TOTP one-time password codes. Autofill and a dedicated Magikeyboard make filling any field easy.

KeePassDX is open source under the GPLv3 license and completely ad-free, so anyone can build, fork, and verify the encryption. The main features are fully free with no capability behind a paid tier. It is developed by Jeremy Jamet of Kunzisoft, with releases on F-Droid and GitHub.