Easy, simple & clear
Your travel accounts for about a quarter of your carbon emissions. The CarbonDiem app logs every one of your journeys automatically and shows you the emissions for each leg and each mode of transport. So you can make informed choices that will actually make a difference.
Try the app today - free for everyone forever
Your complete travel record
You can scroll through your entire trip history in the app, and can edit details of any journey with just a couple of clicks. The app automatically calculates the carbon emissions or amount of calories you burnt for every journey.
CarbonDiem runs in the background on your phone to figure out when and how you're moving so you don't need to remember to open the app, or keep any records. It handles battery management by waking up only when it needs to and storing only the minimum amount of data.
No preaching, nagging or nudging - just your own data to help you make informed decisions
The options we have and the changes we can make are unique to each one of us. So you won't find any generic, unhelpful or judgemental advice in CarbonDiem.
Instead, it breaks down the complex effects of your travel into the simple carbon emissions and calories for each leg. That way, you can understand the health and climate implications of each journey and see the impact of any changes you make.
Working together to make a difference
Transport creates a quarter of all carbon emissions, so even small improvements to the transport system can have a huge environmental benefit. That's why we work with local authorities, national road agencies and transport operators to make transport better.
You can boost your impact by contributing your non-personal travel information to our community data store that helps transport professionals design the system around how we actually travel. And you can make your voice heard by answering in-app questionnaires from organisations that can make a difference.
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