Carbon Donut: act on climate 4+

CO2 calculator & climate coach

Spark Sustainability Ab

Designed for iPad

    • 4.6 • 97 Ratings
    • Free



Discover solutions that help you reduce carbon emissions, learn about all things climate action, and measure your impact with Carbon Donut!

Calculate your lifestyle emissions to learn where you can make the biggest impact with the lowest effort. Track your progress and see how you get closer to our global climate goals!

Unlock a treasure of knowledge that helps you make climate-smart decisions in everyday life.

Put your knowledge into action and explore concrete tips to reduce your carbon footprint! Carbon Donut gives tips tailored to your lifestyle, and for each action you see how big an impact you can make in terms of CO2 reductions.

Find products and services that can help you reduce emissions in the blink of an eye! Complete lessons and log actions to unlock climate-smart deals.

We’re continuously working on improving Carbon Donut to fit you and your lifestyle. Let us know what we can do to make you love it more by leaving a review.

What’s New

Version 1.9.1

We've fixed a bug that prevented users from logging climate actions in the app.

Ratings and Reviews

4.6 out of 5
97 Ratings

97 Ratings

kkdkel24 ,

Makes climate action easy

I’ve learned so much about my emissions and how to reduce them. Gives a really good sense of my own impact over time. Is also a stark reminder that there’s a lot of work to do.

Developer Response ,

Thank you for your feedback, we're thrilled to hear that Carbon Donut has helped you reduce emissions! If there's anything you'd like to see more of in the app, don't hesitate to reach out at

nysse12 ,

Helppo käyttää

Mielenkiintoisia taskeja tärkeän aiheen parissa. Appi helppo käyttää.

Developer Response ,

Mahtavaa kuulla, että pidät Carbon Donut -sovelluksesta! Jos sinulla on toiveita liittyen sovelluksen sisältöön, voit milloin vain lähettää niitä meille osoitteeseen

ainopp ,

Kivoja uusia ominaisuuksia ja actioneita!

Uudet kurssit ja pienemmät tietoiskut on tosi hyödyllisiä. Tietoiskut on sopivan lyhyitä ja paljon tuli vastaan asioita joita ei ole itse tullut ajatelleeksi. Actioneista eniten tullut käytettyä kasvisruokavalioon liittyviä vinkkejä ja haasteita. Muitakin itselle sopivia tapoja alentaa omaa päästökuormitusta on löytynyt ja vinkkien avulla ollut helppo ottaa käyttöön arjessa myös pysyvämmin. 🌞

App Privacy

The developer, Spark Sustainability Ab, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Location
  • Contact Info
  • User Content
  • Usage Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Contact Info
  • User Content
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More

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