A mobile app that rewards you for reducing your carbon emissions from car, train, and airplane trips.


Track and reduce your carbon emissions

offCents provides real time, automated tracking of your transportation carbon emissions and lets you offset your carbon footprint from your car, train, or airplane trips. The team at offCents asked me to redesign the iOS version of the app with new features and an improved UX in the months leading up to Earth Day when Apple would highlight offCents on the front of the App Store.

ROLE: Design Lead
Product design, UX design, data visualization


Defining the design system

Most mileage trackers are neutral – they present your travel data and that’s that. We wanted the new offCents to feel different and decided that a positive, game-like look and feel would encourage people to open the app often to see where they stand.


The CO2 balance

offCents allows you to earn credits in the app by walking or biking. You use these earned credits, along with traditional carbon credits, to offset your monthly CO2 emissions. After some usability testing we decided to adjust the new interface to look more like a credit card app with a real-time CO2 balance. This approach encourages people to offset more as they bring their CO2 emissions balance to zero.


offCents Rewards

offCents gives you points every time you offset your CO2 balance. Points can be used for environmentally friendly rewards like smart lightbulbs or discounts on your energy bill. The new design makes offCents Rewards easier to redeem and gift to other offCents users.



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