Stratum is a **free** and **open-source** two-factor authentication app for Android. It features **encrypted backups**, icons, categories, a high level of customisation and even a **Wear OS 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.

Unlike some alternative apps, Stratum gives you control over your data. You can **import** from other apps and **export** at any time. Stratum only requires a single permission and does not require Internet access to function.

## Features

- **Backup and Restore**: Backup your authenticators with strong encryption. In case you lose or change your phone, you can still log in.

- **Compatibility**: Stratum is compatible with most providers and accounts using TOTP, HOTP, mOTP and more.

- **Import**: Easily migrate your accounts to Stratum from supported alternative apps.

- **Security**: Set a password and use biometric authentication to protect your codes with encryption.

- **Icons and Categories**: Find your authenticators easily with recognisable brand logos and icons next to each code, and organise your authenticators into categories to quickly narrow down your selection.

- **Customisation**: Change density and accent colour. You can also arrange your authenticators in any order you like, so you can find them easily.

- **Wear OS**: Quickly view your authenticators directly from your watch. Please note that a connection to your Android device is required.

The app uses the Material You design language. You can choose between dynamic colour or preset accent colours in either light, dark or black themes. Futhermore, different display densities are available to view more or fewer codes at a single glance.

Stratum is currently only available on the F-Droid client through the IzzyOnDroid repo. You must first add this repository in the F-Droid client.