2FA Authenticator - OTP

2FA Authenticator - OTP is a lightweight, security-first app that generates two-factor (2FA) verification codes for services like Google, GitHub, banks, and crypto exchanges. Every code is generated entirely on your device — no internet required.

■ Key features

• Standard TOTP (RFC 6238) 6-digit codes — refreshed every 30 seconds, fully offline

• Add accounts by scanning a QR code or entering a setup key manually

• Import directly from Google Authenticator export (migration) QR codes

• Encrypted backup export & import — move accounts to another device safely as a password-encrypted file or QR code

• Many accounts? No problem — split across multiple QR codes, each imports independently

• Categories, search, and sort by name keep large lists tidy

■ Security comes first

• Secret keys are stored in encrypted storage backed by the Android Keystore (EncryptedSharedPreferences)

• Screen capture and recording are blocked to prevent code leaks

• Cloud backup disabled so secret keys never leave your device

• Copied codes are marked as sensitive for the clipboard

• Plaintext keys are wiped from memory right after each code is generated; release builds are code-obfuscated

■ Who it's for

• Anyone managing 2-step verification for many services in one place

• Anyone moving authenticator accounts safely when switching phones

• Anyone who cares about the security and privacy of their authentication data

This app is completely free with no ads. It does not even request the Internet permission, and your secret keys are never transmitted anywhere.