Stratum - Authenticator App

4.9
470 reviews
10K+
Downloads
Content rating
Everyone
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About this app

Stratum (formerly Authenticator Pro) is an open-source two factor authentication app for Android. It features encrypted backups, icons, categories and a high level of customization. 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.

2 Factor authentication provides an extra layer of security to your accounts by requiring the use of a one time code to log in.
In addition to your username and password, you will need a code provided by Stratum. So even if your login details are compromised, your account remains safe.

Features

- āš™ļø Compatibility: Stratum is compatible with most providers and accounts.
- šŸ“² Import: Easily migrate your accounts to Stratum from supported alternative apps.
- šŸ’¾ Backup / Restore: Backup your authenticators with strong encryption. In case you lose or change your phone, you can always gain access to your accounts. You can save backups to cloud storage or to your device.
- šŸŒ™ Dark Mode: Stratum has a beautiful material design inspired look in either light or dark themes.
- āŗļø Icons: Find your authenticators easily with recognizable brand logos and icons next to each code.
- šŸ“‚ Categories: Organize your authenticators into categories.
- šŸ”’ Offline with few permissions: Stratum only requires a single permission¹ and does not require Internet access to function.
- šŸ”‘ Security: Set a password and use biometric authentication to protect your codes.
- šŸŽØ Customization: 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. You can even set a favorite and place it in a tile. Please note that a connection to your Android device is required. Furthermore, F-Droid distributions of the app are not compatible with Wear OS, since non-free dependencies are required.

(¹) *To scan QR-Codes, the app requires the camera permission.*

https://stratumauth.com/wiki/faq

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.
Updated on
Aug 17, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.9
418 reviews
Ryan Ragoobeer
November 4, 2024
Singlehandedly one of the best apps I've ever used. Especially with its integration to allow codes to be synced to my Wear OS is a life and a timesaver. I was saddened to read some time ago that the authenticator app was removed from the playstore, good thing I had a backup when I wiped my device of I would've been in trouble. I'm glad it's back! Thank you for making 2FA a whole lot easier to navigate.
16 people found this review helpful
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Steven Livingston
May 27, 2025
I remember using an older Auth app that went dead. This app was the only one that accepted its imports. I've been using for several years, and glad to see dev was able to continue under this new application. Top notch application, it simply works. WearOS compatibility is great. Keep up the good work. For those who were saying the codes were barely visible, turn off the "Dynamic Color" option and the codes will be properly visible in either light or dark mode.
10 people found this review helpful
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Josh
October 8, 2025
Really nice 2FA app. I would strongly recommend this over any other similar app because it's open source and no ads or paid version. Will definitely buy this man a coffee.
4 people found this review helpful
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What’s new

- New feature: Show uncategorized entries
- New feature: Import from Proton Authenticator
- New feature: Ability to lock custom sorting
- General: 38 new and updated icons
- General: Improved unlock speed
- General: Translation updates