Keepass2Android Offline app
Keepass2Android Offline is Security tool that is open source under the GPL-3.0-only license.Keepass2Android Offline is a password manager app. It allows to store and retrieve passwords and other sensitive information in a file called "database". This database is secured with a so-called master password. The master password typically is a strong password and can be complemented with a second factor for additional security. The password database file can be synchronized across different devices. As this is not built-in with this version, you will need a third-party application to do this.
Keepass2Android is compatible with Keepass 1 and Keepass 2 on Windows and KeepassX on Linux.