lockpaper notes

lockpaper is a minimalist, security-focused notes application for Android, built entirely with Flutter. It adheres strictly to an offline-first philosophy, ensuring your notes stay private and reside only on your device.

Core Principles

• Privacy by Design: No network permissions are required for core functions. Your data never leaves your device.
• Secure Storage: Notes are encrypted at rest using SQLCipher (AES-256) and access is protected via Biometrics or PIN code.
• Modern & Smooth: Built with Material 3 guidelines, featuring dynamic color theming and smooth animations.
• Lightweight: Designed for a small installation size (<15MB) and efficient performance.
• No Ads, No Trackers: Aims for a sustainable one-time purchase model, respecting user privacy completely.

Key Technologies

Developed using Flutter, Riverpod for state management, GoRouter for navigation, and Drift with SQLCipher for secure, on-device database storage.