LeakGuard - Password Security

Instantly check if your passwords appeared in known data breaches without ever sending your password anywhere. LeakGuard uses k-anonymity technology to check your passwords against over 800 million known breach records. Only the first 5 characters of a scrambled hash ever leave your device. Your actual password stays on your iPhone. Always. HOW IT WORKS 1. Enter any password 2. LeakGuard computes a partial fingerprint on-device 3. Only 5 characters of that fingerprint are sent to the breach database 4. Your result comes back in seconds — safe or compromised Your password is never transmitted. Not even close. BREACH CHECKER • Check any password against 800M+ known breach records • Instant results in under 3 seconds • Full offline privacy — nothing sensitive leaves your device • Free: 5 checks per day PASSWORD GENERATOR • Cryptographically secure generation via SecRandomCopyBytes • Custom length (8–64 characters), symbols, numbers, mixed case • Presets: Standard, Memorable, Wi-Fi, PIN, Apple ID • Excludes ambiguous characters (0, O, l, 1, I) for readability STRENGTH METER • Real-time scoring from 0–100 • Detects sequential patterns, repeated characters, and common passwords • Checklist: see exactly what makes a password weak or strong CHECK HISTORY • Stores only a cryptographic hash — never plaintext • See which passwords were safe vs. compromised over time • Fully local: no cloud sync, no server storage COMING SOON: EMAIL BREACH MONITORING • Check if your email addresses appeared in known data breaches • Get notified when new breaches are discovered • Sign up inside the app to be notified at launch PRIVACY FIRST LeakGuard was built around one principle: your secrets never leave your device. We use the industry-standard k-anonymity model from Have I Been Pwned — the same technology trusted by millions worldwide and built into Apple's Password Manager. • No account required • No data stored on any server • No third-party analytics with personal data • An open privacy model you can verify yourself LEAKGUARD PRO Upgrade to Pro and remove all limits: • Unlimited password checks per day • Advanced generator with all presets • Full history with strength scores • Home screen and Lock Screen widgets • Priority access to Email Breach Monitoring at launch Privacy Policy: https://bejewled-hell-727.notion.site/Privacy-Policy-LeakGuard-3bc397b59a3d801eafc7d5352ff6b369 End User License Agreement (EULA): https://bejewled-hell-727.notion.site/End-User-License-Agreement-EULA-LeakGuard-APP-3bc397b59a3d8095b385c0108d9d03c5