KeePassium is a privacy-first password manager for iOS and macOS that combines the trusted open source format of KeePass with a clean, intuitive design and full user control over where databases are stored. It supports offline or cloud-based database files, automatic two-way sync with any storage provider accessible via the Files app, and AutoFill for websites and apps. KeePassium supports all major KeePass database formats (kdb, kdbx3, kdbx4) and uses strong, time-proven encryption algorithms such as AES, ChaCha20, Twofish, and Argon2. It includes features like custom entry fields, custom icons, TOTP codes, file attachments, Face ID/Touch ID or passcode unlock, full accessibility support (VoiceOver, large text), entry history, recycle bin for deleted entries, and pre-saving of database copies for safety. It is open source under GPLv3, allowing auditability by anyone.