Diary with Lock - Flutterflow App

Diary with Lock is a sleek and secure personal journal app designed for individuals who value both simplicity and privacy. Built for web, iOS, and Android platforms, the app enables users to effortlessly capture daily reflections, emotional entries, or creative thoughts—while ensuring these stay private through timed auto-lock and biometric protection. Its clean interface makes journaling a joy, whether you’re on desktop or mobile.

🔒 Auto-lock after 30 minutes of inactivity or app backgrounding for enhanced privacy

✍️ Minimalist and intuitive UI/UX focused on distraction-free journaling

📄 Export entries as PDF with rich formatting for long-term backup or sharing

🧠 Streak counter to motivate daily writing habits

💡 Formatted HTML text editor widget for beautiful entries

💎 Free and premium tier system, with seamless payment and unlock logic

FlutterFlow (cross-platform UI & logic development)

Firebase (auth, Firestore, functions)

Stripe (for web payments)

RevenueCat (for iOS & Android subscription management)

Lifecycle Management & Permissions: Implemented cross-platform logic to auto-lock the app securely after inactivity or when leaving the screen—solved with platform-aware lifecycle tracking.

Cross-Platform PDF Export: Ensured high-fidelity PDF export with styled text across web, Android, and iOS, resolving platform inconsistencies.

Subscription Sync: Unified RevenueCat and Stripe data to reflect accurate subscription status across all platforms.

UI Simplicity: Maintained an ultra-clean interface while still supporting rich formatting tools and export features, using custom FlutterFlow widgets.

🚀 2 weeks from design concept to fully functional web and mobile builds.

✅ Web app is live and fully functional: Try it here

📱 iOS & Android versions are ready for store deployment—awaiting client go-live

As the sole FlutterFlow expert, I led the app from scratch to production, covering UI/UX design, backend setup, integration implementation, and deployment support. My focus was on speed, clean design, and cross-platform harmony, ensuring the app feels native and polished on every device. I also optimized the payment system across web and mobile using Stripe and RevenueCat, saving the client time and future maintenance headaches.