Building a Cross-Platform Local-Only Password Manager with Flutter: Why We Chose Platform Security Over Cloud Storage

TL;DR We built PasswordSafeVault because cloud password managers claim "zero-knowledge" but still hold your encrypted data. Our solution: local-only storage with Flutter, using platform-specific security (iOS Keychain/Android Keystore), no cloud sync, no accounts, just your device. Cross-platform from a single codebase. App Store | Download The Problem with Cloud Password Managers As developers, we understand the appeal of cloud services. But when it comes to password managers, the cloud model has fundamental flaws: // The cloud password manager flow user -> encrypt -> internet -> cloud -> storage ↑ ↑ ↑ ↑ risk: risk: risk: risk: master pwd local env network server Recent incidents highlight the risks: LastPass: Multiple breaches, source code stolen 1Password: Government data requests acknowledged Bitwarden: Better (open source) but still cloud-based The uncomfortable truth: "Zero-knowledge" ≠ Your data. They still hold your encrypted vault. Our Solution: PasswordSafeVault (