Authenticator Pro is 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) and Steam are also supported.

Authenticator Pro 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.

Frequently Asked Questions

Contribution Guide

Backup File Format

Google Authenticator

Blizzard Authenticator

Steam

Authy

• Compatibility : Authenticator Pro is compatible with most providers and accounts.

• 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.

• Dark Mode : Authenticator Pro has a beautiful material design inspired look in either light or dark themes.

• Icons : Find your authenticators easily with recognisable brand logos and icons next to each code.

• Categories : Organise your authenticators into categories.

• Offline with few permissions : Authenticator Pro only requires a single permission and does not require Internet access to function.

• Customisation : Set icons and rename. 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.

• Camera permission is required to add accounts through QR codes.