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1Key vs Monica: catalog facts
1Key	Monica
Free Free and open source under GPL-3.0-or-later.	Free Free and open source under the GPL-3.0-only license.
Android	Android
Stores TOTP codes with their associated credentials Can autofill logins in apps and browsers	Stores passwords and sensitive records in an encrypted local vault Includes autofill, passkeys, and TOTP/HOTP codes
Android only No cloud sync	Android only Passkey creation may not work on some Xiaomi HyperOS devices
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.