Aegis

How to Decide

Aegis is a free open‑source Android app that generates TOTP and HOTP codes with AES‑256‑encrypted local storage, used by Android users who need on‑device 2FA without cloud sync. The alternatives split into a few clear camps: Authy leans on encrypted cloud backup and multi‑device sync for seamless recovery; Yubico Authenticator relies on storing secrets on a physical YubiKey hardware token, keeping them off the host device entirely.

When choosing a replacement, focus on (1) platform coverage – Aegis is Android‑only while Authy is Android‑only but adds multi‑device sync and Yubico Authenticator spans Android, iOS, Windows, macOS and Linux; (2) backup and recovery model – Aegis requires manual encrypted exports, Authy provides automatic cloud‑encrypted backup, and Yubico stores secrets on a hardware key; (3) source and cost transparency – Aegis is open‑source and free, Authy is closed‑source but free, whereas Yubico Authenticator is closed‑source and free but mandates purchasing a YubiKey; (4) security posture – Aegis encrypts locally with a password, Authy encrypts backups in the cloud, and Yubico keeps secrets off the device entirely, which may matter for threat models involving device compromise.