KeyNest

KeyNest is an offline-first Android password and passkey manager. Your credentials

are stored only on your device and are never transmitted to any external server.

No account, no cloud sync.

What KeyNest does

- Acts as an Android Autofill service, surfacing matching credentials on login screens

- Works with inline suggestions on GBoard and other IMEs

- Unlocks via biometric (fingerprint / face) or device credential when an autofill

candidate is selected

- Acts as a Passkey provider on Android 14 and later (selectable from "Passwords,

passkeys & autofill" settings)

- Encrypts secrets with AES-GCM, with keys backed by the Android Keystore

(TEE / StrongBox where available)

- Supports custom fields for business apps that ask for member number, staff ID,

branch code, or other non-standard inputs

- Reuses fields detected during prior autofill sessions when you register new

credentials

- Material 3 with automatic light / dark theme switching

What KeyNest does NOT do

- No cloud sync

- No multi-device sharing

- No external data transmission, including backup uploads

- No account registration, no sign-up

If you need the same data on multiple devices, please wait for an upcoming export

feature.

Privacy by design

KeyNest does not send your credentials to the developer, Google, or any third party.

The INTERNET permission is intentionally not declared in AndroidManifest, so any

network attempt anywhere in the app fails fast at the OS level with a

SecurityException.

Who it's for

- People who want their passwords to stay on the device

- Anyone storing business app logins alongside member numbers / staff IDs

- Privacy-conscious users uncomfortable with cloud password managers

- Anyone looking for a lightweight passkey provider on Android 14+

Requirements

- Android 8.0 (API 26) and later

- Passkey features require Android 14 (API 34) or later

Open source

KeyNest is MIT licensed. Source code and the vulnerability disclosure channel are

available on GitHub.

https://github.com/hitoshiichikawa/KeyNest

Privacy policy

https://hitoshiichikawa.github.io/KeyNest/privacy-policy

Terms of service

https://hitoshiichikawa.github.io/KeyNest/terms

Support

https://hitoshiichikawa.github.io/KeyNest/support