Opty vs TwoFac

Opty is a fully offline TOTP authenticator built for people who refuse to compromise on privacy. There is no cloud, no backend, no syncing, and no internet permission. Every authentication code is generated and stored only on your device in encrypted form. Nothing is uploaded. Nothing is shared. Ever. Most authenticator apps depend on servers, analytics, and online services. Opty eliminates all of that. With zero network access, your data remains physically isolated on your phone, making remote breaches and mass data leaks impossible by design. Core Principles: 100% offline operation No backend, no cloud, no syncing No internet permission required Encrypted local storage Zero tracking, zero analytics No accounts, no data collection How It Protects You: All TOTP secrets are stored locally using strong encryption Codes are generated on-device only No third-party SDKs that track or transmit data Even we cannot see your codes Designed for Reliability Opty works anytime, anywhere — even in airplane mode. Whether you’re traveling, in low-network zones, or simply prefer keeping your security tools offline, Opty keeps your access uninterrupted. Who It’s For: Privacy-focused users Developers and security professionals Anyone who wants full ownership of their authentication data With Opty, your phone becomes your authenticator — not a gateway to someone else’s servers. Your codes. Your device. Your control.

Your two-factor codes. Private, secure, always available. TwoFac is an offline authenticator that keeps your one-time passwords exactly where they belong — on your device. No account to create, no server to trust, no subscription to manage. Just your codes, ready when you need them. PRIVATE BY DESIGN Every secret is encrypted and stored locally using your device's secure storage. TwoFac has no backend, no analytics, and no data collection of any kind. Your codes never leave your phone unless you explicitly export a backup. SIMPLE TO USE • Scan a QR code to add any TOTP account in seconds • Enter codes manually with full field validation • Copy any token with a single tap • See exactly how long your code is valid with a live countdown • Organize accounts into folders to keep things tidy BACKUP WHEN YOU WANT Export an encrypted backup file protected by a password you choose. Save it to iCloud Drive, share it to Files, or keep it anywhere you like. Restore it on any device running TwoFac. Your backup, your rules. SECURE AT REST • Secrets encrypted with AES-GCM on-device • Optional biometric app lock (Face ID / Touch ID) • Automatic re-lock after a configurable timeout • Screenshot prevention in the app switcher COMPATIBLE WITH EVERYTHING TwoFac works with any service that supports TOTP (RFC 6238): Google, GitHub, Dropbox, Notion, Stripe, Amazon, Cloudflare, Twitter, Discord, and thousands more. FREE. ALWAYS. TwoFac is and will always be free to use. No ads. No in-app purchases. No premium tier. If you find it useful, a small donation keeps the project alive — but there's no obligation whatsoever. SUPPORTS TOTP / RFC 6238 · SHA-1, SHA-256, SHA-512 · 6- and 8-digit codes · 30- and 60-second periods · otpauth:// URI standard · iCloud Drive backup · Encrypted JSON export/import Terms Of Use (EULA): https://leomelegari.github.io/twofac-site/terms Privacy Policy: https://leomelegari.github.io/twofac-site/privacy