Kaizen

Kaizen is a cross-platform Pomodoro timer app that combines personal productivity with social accountability. Built with React Native and Expo, it helps you focus better through timed work sessions, beautiful themes, and collaborative Focus Rooms where you can study alongside others. Check it out at my-kaizen.app, visit the marketing website, or download it on Google Play.

⏱️ Pomodoro Timer

The foundation of Kaizen. A beautifully designed timer with customizable work sessions (5-90 min) and break durations. It keeps running accurately even when you switch apps or lock your phone, and notifies you when sessions end with sound and vibration options. Auto-start options let you seamlessly flow between sessions and breaks.

Kaizen Pomodoro timer interface showing a focus session with a LOFI illustrated theme and progress ring

🎨 Beautiful Themes

From cozy LOFI illustrations like Sunset Cat, Lakeside Cabin, and Sakura Moonlight to stunning nature photography backgrounds. Over 15 themes to match your mood and keep you motivated.

Kaizen theme selector showing LOFI illustrated and nature photography themes

🎵 Focus Music

Built-in music library with lo-fi beats, ambient sounds, nature sounds, white noise, and classical music. Volume control, auto-mute on breaks, and seamless looping so you never have to leave the app.

Kaizen focus music library showing different music categories

👥 Focus Rooms

Study together, even when you're apart. Focus Rooms bring the body doubling technique to your pocket. Create public or private rooms for 2-50 members with real-time presence, live timer sync across all members, and automatic idle detection to ensure genuine engagement.

✅ Task Management

Tap a task, start focusing, and Kaizen tracks your time automatically. Create tasks with priorities, due dates, subtasks, and time estimates. No more guessing where your time went.

📊 Statistics & Streaks

Track your focus time, session history, and daily streaks to build consistent habits. Heatmaps and charts show your focus patterns by hour, completion rates, and insights into your productivity. All synced to the cloud across your devices.

💻 Technologies

  • 📱 React Native with Expo SDK 54 for cross-platform mobile and web support
  • ⚛️ React 19 with TypeScript for a modern, type-safe codebase
  • 🗄️ Supabase for authentication, PostgreSQL database, and real-time functionality
  • 💳 RevenueCat for subscription management across platforms
  • 🌐 VitePress for the static marketing website at my-kaizen.com