LockMemo: Password & 2FA

Your vault. Yours alone.

LockMemo is an on-device, end-to-end encrypted vault for the things you can't afford to lose or leak — passwords, 2FA codes, private notes, file attachments, and recovery seed phrases. Everything is encrypted directly on your device using your master passphrase. There is no account, no server, and no tracking.

Key Features:
• No accounts, ever: You create a local master passphrase — it never leaves your device and we never see it.
• Absolute privacy: No servers, no telemetry, and no ads. There is no backend to breach and no data to sell.
• Encrypted by design: Powered by industry-standard AES-256-GCM for content, Argon2id (RFC 9106) for key derivation, and HMAC-hashed file names.

What You Can Store:
• Logins & Passwords: Secure storage with custom fields.
• 2FA / TOTP Codes: Compatible with Google Authenticator, featuring a one-tap import for your existing tokens.
• Secure Notes: Write and organize your private thoughts in clean Markdown.
• File Attachments: Images, PDFs, and documents are previewed securely in-app and never written to disk unencrypted.
• Seed Phrases: BIP39-validated storage with biometric-gated reveal and screenshot protection.

Your Sync, Your Choice (Optional Premium):
• Optionally back up and sync your encrypted vault to a Git repository you own (GitHub, GitLab, or self-hosted) using your personal access token.
• Your Git host only ever sees encrypted bytes and hashed file names — your actual data remains completely invisible to them.
• Git sync is a one-time Premium purchase. Everything else is 100% free, and the app operates fully offline without it.

IMPORTANT NOTE ON SECURITY:
LockMemo is a true zero-knowledge app. Your encryption key is derived solely from your master passphrase and is never transmitted anywhere. If you forget your master passphrase, there is absolutely NO way to recover your data. Built for people who prefer to keep their own keys.