Stepwise

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  Demo

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  Stepwise

Inspiration

Chasing for the next destination in big cities, we often don’t see the climate and individual impact of our choices, meanwhile our daily choices (walk one more stop, take transit instead of a ride-hail, explore locally) add up. We wanted to make “green choices” something you can feel right away. As you walk through your real city, you also see a digital city get greener. Trees grow, gardens bloom, and rooftops change, making sustainability more fun, visible, and motivating.

What it does

Stepwise tracks your “green miles” in two ways: Passive walking tracking via live geolocation and trip logging. As miles accumulate, you unlock milestones (trees, gardens, green roofs) plus an achievements panel (e.g., first mile, 3 trees, garden unlocked, 50kg CO₂ saved). The app also estimates CO₂ saved as well as the healthy benefits of such actions.

How we built it

• Mapping + 3D city feel: Mapbox GL JS renders the real map.
• Real-world Sensing: Presage - Fitness Intensity Monitor
• Movement tracking: browser Geolocation API (watchPosition) + a haversine distance function; we ignore - tiny movements to reduce GPS jitter.
• True mode detection: distinguish walking vs. transit vs. biking (and reward them differently).
• Frontend: HTML/CSS/JS.

Challenges we ran into

• Creating 3D rendering effect of the digital city.
  • Accessing Individual Health Data - we did it through using Presage AI.

Accomplishments that we're proud of

• 3D buildings + real map + digital green overlay in one cohesive UI.
• Real-time health and climate impact monitoring.
• A full game loop: tracking, milestones, achievements, notifications, progress bar.

What we learned

• How individual actions can change spaces.
• How to build a game.

What's next for Stepwise

• Social layer: Leaderboards, group challenges (e.g., “Dorm vs Dorm”), and friend streaks.
• More city building: Neighborhoods, parks, landmarks, and missions tied to real places.
• Mobile Application: Turn everything into a downloadable mobile and iWatch application.
• Navigation: Built-in map for walking and public transit

Built With

• fetchai
• langchain
• presage
• vercel