Aegis Authenticator is a free and open-source two-factor authentication (2FA) app for Android that helps users secure their online accounts by generating cryptographic one-time passwords (OTPs) such as TOTP and HOTP codes. Unlike many proprietary MFA apps, Aegis is designed with user privacy and local control in mind, storing secrets only on the device in an encrypted vault protected by PIN or biometric unlock, and offering features like backups encrypted with a user-chosen passphrase. It supports importing accounts from QR codes, exporting encrypted backups for safe storage, and grouping or labeling tokens so managing dozens of accounts is simple. Aegis also offers options for custom token configuration, including changing issuer names, digits, and intervals, and includes a robust recovery mechanism in case a device is lost. It has a material design interface that makes navigation intuitive, and its open-source license ensures transparency.

Features

  • TOTP and HOTP token generation
  • Local encrypted vault for token secrets
  • Secure backup with user-chosen encryption passphrase
  • Biometric or PIN unlock protection
  • Custom token configuration and management
  • Open-source authentication implementation

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Categories

Authentication

License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

Android

Programming Language

Java

Related Categories

Java Authentication Software

Registered

2026-01-13