[](https://crowdin.com/project/authenticator-pro)
A free open-source two factor authentication app for Android. It features encrypted backups, icons, categories and a high level of customisation. It also has a Wear OS companion app.
It supports TOTP (Time Based) and HOTP (Counter Based) authenticators using either SHA1, SHA256 or SHA512 hashing algorithms. Mobile-Otp (mOTP), Steam and Yandex are also supported.
## Download β¬οΈ
[
](https://play.google.com/store/apps/details?id=com.stratumauth.app)
[
](https://apt.izzysoft.de/fdroid/index/apk/com.stratumauth.app)
> Stratum is currently only available on the F-Droid client through the [IzzyOnDroid repo](https://apt.izzysoft.de/fdroid/). You must first add this repository in the F-Droid client.
### Signature
In order to verify the authenticity of the APKs, compare the certificate signatures using `apksigner` with these values:
```
SHA-256 digest: b975b325e4f39465df1034d6bc2c11a3926f60cc07b820c51fbe1c757555f28a
SHA-1 digest: b6a100cefaf7f4bc7d0879d71ad36c555a8b850e
MD5 digest: bb884532b0ee1b3f04dd9917409d5126
```
## Support development β€οΈ
[
](https://www.buymeacoffee.com/jamiemh)
## Quick Links π
[Request Icons](https://github.com/stratumauth/app/issues/new?assignees=&labels=enhancement&template=icon_request.md&title=)
[Frequently Asked Questions](https://github.com/stratumauth/app/wiki#frequently-asked-questions)
[Contribution Guide](https://github.com/stratumauth/app/blob/master/CONTRIBUTING.md)
[Backup File Format](https://github.com/stratumauth/app/blob/master/doc/BACKUP_FORMAT.md)
### Importing from other apps:
[Google Authenticator](https://github.com/stratumauth/app/wiki/Importing-from-Google-Authenticator)
[Blizzard Authenticator](https://github.com/stratumauth/app/wiki/Importing-from-Blizzard-Authenticator)
[Steam](https://github.com/stratumauth/app/wiki/Importing-from-Steam)
[Authy](https://github.com/stratumauth/app/wiki/Importing-from-Authy)
## Features πͺ
βοΈ **Compatibility:** Stratum is compatible with most providers and accounts.
πΎ **Backup / Restore:** Backup your authenticators with strong encryption. In case you lose your or change phone, you can always gain access to your accounts. Save to cloud storage or to your device.
π **Dark Mode:** Stratum has a beautiful material design inspired look in either light or dark themes.
βΊοΈ **Icons:** Find your authenticators easily with recognisable brand logos and icons next to each code.
π **Categories:** Organise your authenticators into categories.
π **Offline with few permissions:** Stratum only requires a single permission and does not require Internet access to function.
π¨ **Customisation:** Set icons and rename. You can also arrange your authenticators in any order you like so you can find them easily.
β **Wear OS:** Quickly view your authenticators directly from your watch. Please note that a connection to your Android device is required.
## Screenshots π±
### Wear OS Companion
## Permissions π
* Camera permission is required to add accounts through QR codes.
## Disclaimer
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.