Opty vs Keylet

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.

Keylet is the privacy-first authenticator that fills your 2FA codes right above the keyboard — without opening the app, and without ever showing a code on screen. From the makers of Authenticator+ — and switching is effortless. Import your accounts in seconds, straight from Authenticator+, Google Authenticator, Authy, Microsoft, 1Password and more — or even from a single screenshot, with no second device needed. Your secrets never leave your phone. Everything lives in an encrypted, zero-knowledge vault (AES-256-GCM) that only you can open. No account. No cloud. No tracking. No ads. WHY KEYLET • AutoFill, done right — tap a verification-code field and Keylet offers the right code. It fills it; it never displays it. Nothing to shoulder-surf. • Import in seconds — from Authenticator+, Google Authenticator, Authy, Microsoft, 1Password, a backup file, or a screenshot. No second device required. • Multiple vaults — keep work and personal completely separate, each encrypted on its own. • Encrypted sharing — hand a code to someone you trust over end-to-end encryption, with a self-destructing expiry. • Backed up, safely — automatic daily encrypted backups on your device, plus password-protected export. No cloud needed. • Yours to organise — biometric lock per account, categories, recovery keys and home-screen widgets. • No ads. Ever. Unlimited accounts, free. Keylet keeps your second factor exactly where it belongs: in your hands, encrypted, and out of sight. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://studiofifteen.nl/app/keylet/privacy