Jot - Your productivity companion

Jot - Your Productivity Companion
Register Screen
Login Screen
Onboarding 1
Onboarding 2
Onboarding 3
Home Screen 1
Home Screen 2
Home Screen 3
No Goals Screen
Goals Screen
Add Goal
Task Completion
Level Upgrade
Pet Evolution
Empty Feed Screen
Feed Screen
Profile Screen

🌱 Inspiration

Traditional productivity apps track habits, streaks, and tasks, but progress often feels invisible and impersonal. Users check off completed tasks, yet there is no emotional connection to their effort or sense of personal growth.

We drew inspiration from:

🎮 Games, where characters evolve as a reflection of player progress
📱 Social platforms, where visibility reinforces behavior

This led to a simple question:

What if your consistency became a living avatar that grows with you?

🐾 What JOT Does

JOT is a mobile-first productivity app where habits power an evolving digital companion.

✅ Set and Track

Users set daily goals and log progress with a single tap, reducing friction and making consistency effortless.

🔥 Elemental Avatars

Each user chooses a companion aligned with an element:

Fire
Water (in development)
Earth/Rock (in development)
Air (in development)

These pets are not just cosmetic — they represent the user’s discipline, personality, and growth journey.

🧬 Evolutionary Loop

Consistency earns XP and streaks, allowing pets to evolve through stages:

Baby → Growing → Advanced → Legendary

XP progression follows a non-linear curve so early progress feels motivating while higher levels remain meaningful and rare.

⚖️ Meaningful Consequences

Inactivity affects the pet’s mood and can even trigger devolution. This creates emotional accountability and makes consistency meaningful rather than mechanical.

📰 Social Feed

A built-in social feed automatically shares major milestones such as level-ups and evolutions, providing social reinforcement and motivation through visibility.

🛠 How We Built It

We used a modern, reactive stack to make the experience feel like a game rather than a utility.

Frontend: React Native (Expo) with TypeScript and Expo Router
State Management: Zustand
Server State: TanStack Query
Backend: Hono running on Bun
Caching Layer: Redis

Architecture: JOT uses an event-driven system where habit logs trigger XP calculations, streak updates, avatar evolution checks, and automatic social post generation.

🚧 Challenges We Ran Into

Designing a fair and motivating progression system for avatar level upgrades turned out to be more complex than expected.

Balancing XP Across Different Habit Types

Not all habits require the same effort. A 10-minute walk and a 2-hour deep work session shouldn’t yield identical XP. We had to design a weighted XP system that:

Accounts for effort, duration, and consistency
Prevents users from exploiting “easy” habits for fast leveling
Still keeps the system simple and understandable

Preventing Burnout From Over-Penalization

Introducing devolution and mood decline added emotional weight, but too much penalty discouraged users. We iterated on:

Grace periods before penalties apply
Mood systems that recover gradually
Soft setbacks instead of harsh level drops

Designing a Non-Linear Level Curve

Linear XP growth made early levels too fast and later levels feel impossible. We implemented a non-linear progression curve that:

Rewards early consistency quickly (to hook users)
Gradually increases difficulty for higher evolutions
Keeps Legendary status rare and meaningful

Synchronizing Metrics in an Event-Driven System

Because XP, streaks, evolutions, and social posts are all triggered by habit logs, ensuring consistency across systems was challenging. We had to carefully manage:

Idempotent event handling
Real-time updates without duplicate rewards
Offline logging with correct XP reconciliation once reconnected

🏆 Accomplishments We’re Proud Of

We successfully transformed abstract productivity data into a tangible visual identity. Watching a pet grow creates an emotional reward loop that standard task trackers lack.

We are especially proud of:

A social feed that highlights meaningful milestones like evolutions and major level-ups
High-fidelity animations and haptics that make every “Jot” feel alive
A progression system that feels game-like without becoming manipulative

📚 What We Learned

We learned that gamification is most effective when tied to identity. Shifting the focus from “logging a task” to “evolving a companion” created a much stronger psychological hook for consistency.

We also deepened our understanding of building: