I got tired of habit apps that feel like spreadsheets pretending to be motivation.
So I built something different: Monbii.
It’s a minimalist habit app where your companion evolves based on how consistent you are.
Not in a “points and badges” way, but in a way where your behavior actually changes what you see and interact with.
If you stay consistent, your companion grows.
If you don’t, it reflects that.
There’s also a simple battle system that evaluates your progress every few days based on your habits.
And reminders are built like a system, not spam. They feel more like a companion checking in than a generic notification.
What I used
- React + Capacitor JS (mobile-first web app)
- Zustand for state management
- Supabase / Lovable Cloud for syncing data
- Lottie for mascot animations
What I learned building this
- Most habit apps fail because there’s no emotional attachment
- Users don’t care about features, they care about feedback loops
- If the first 10 seconds don’t feel rewarding, nothing else matters
- Simplicity beats “feature richness” every time
What I’m improving next
- Making the companion reactions more dynamic
- Refining the progression system
- Improving the battle system so it actually reflects behavior better
🔗 Live: https://monbii.vercel.app/
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