# Carbn: Cut Carbon Footprint — Combat Climate Change > App to measure carbon footprint, build green habits, and offset emissions. (iPhone/iPad app by Carbn Ltd.) - Source: https://appshunter.io/ios/app/carbn-cut-carbon-footprint/id1533681322 (this page in markdown: same URL + `.md`) - Developer: [Carbn Ltd](https://appshunter.io/developer/1524629748) - Category: Lifestyle, Productivity - Price: Free - Rating: 4.75/5 from 185 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 38 MB - Languages: English - Released: 2021-01-25 - Data updated: 2026-06-10 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/carbn-cut-carbon-footprint/id1533681322/reviews.md ## What is Carbn? Take effective action against climate change, develop green habits, and challenge your friends and family to do the same. Carbn enables you to understand your carbon footprint and helps you build green habits to reduce your impact on the environment. With Carbn, you: Measure your impact Adopt Ten Green Habits Challenge your friends Carbn simplifies climate action with Ten Green Habits, helping you adapt your lifestyle in an achievable way to reduce your carbon footprint. Track your progress versus your friends, people in your local area, and worldwide as you fight the climate crisis with your individual action. Some emissions are almost impossible to avoid. With Carbn, you can choose to subscribe to mitigate your impact with carbon offsetting projects. By helping you adapt, and enabling you to offset unavoidable emissions, with Carbn you can achieve your goal of becoming 100% carbon neutral. Here’s how Carbn works: – Calculate your carbon footprint – Answer a few quick questions about your lifestyle, and Carbn will tell you your estimated carbon footprint. Understand exactly how your daily activities impact the planet with detailed breakdowns — and start identifying areas for improvement. – Ten Green Habits – Build and sustain greener habits, track your progress over time, and make a real individual difference in the fight for climate change. In Carbn, you earn GreenMiles for green habits you already have. As you build and maintain new ones, these are rewarded too. GreenMiles are great for bragging rights in the leaderboards but can also be exchanged for awards from brands focused on sustainability. – Challenge your friends – Once you’ve started your climate action journey, invite your friends to do the same and see how your progress compares to theirs in private leaderboards, which are a bit like a fantasy football league! – Offset unavoidable emissions – Your footprint will show that some of your emissions are unavoidable or extremely hard to reduce (after all, you can’t expect to live without heating!). But where reduction isn’t possible, offsetting your impact is. In Carbn, you can choose to subscribe to projects that remove an equivalent amount of emissions from the atmosphere, helping you go carbon neutral. Fighting climate change starts at home. Join the Carbn community and build eco-friendly habits, reduce your impact on the planet, and commit to a cleaner Earth. ## Key features - Calculate carbon footprint - Adopt Ten Green Habits - Track progress - Challenge friends - Offset unavoidable emissions - Earn GreenMiles for rewards ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/carbn-cut-carbon-footprint/id1533681322/reviews.md ### 5/5 — CEO *2022-01-21, version 2.0.7* Lovely app ### 5/5 — Can’t find the words… *2021-12-24, version 2.0.4* I think this app is so practical and at the same time it makes it a motivational thing to be green. Brilliantly done!! ### 3/5 — skeptical about the calculation *2021-11-17, version 1.1.8* It asks my electricity/gas bill rather than how much watt electricity/ ccf gas I used, then calculate the carbon footprint. The electricity price and gas price don’t get seasonally adjusted. I doubt the accuracy of the calculation. **Developer response:** Hey iiiuiuiii, Firstly, thanks so much for trying out our app and leaving feedback, we really appreciate it. I wanted to give you a little more information. We ask for information about what US state you're in at the start of the calculator. We keep an up-to-date table of data that tells us, for each state, the average lbs of CO2 emitted per $ spent. From this data, we can calculate the emissions from electricity and gas using your approximate monthly bill. From talking to our users we found that the monthly bill was the easiest number to recall, so you don't need to go looking for specifics like kWh - as you said, this would be the most accurate possible method, but in order to help the most people possible to cut their footprint, we took care to balance precision with ease-of-use. We make sure to benchmark our calculator regularly and we're among the most accurate on the market despite this. Thanks again, The Carbn team ### 5/5 — Groundbreaking *2021-06-15, version 0.3.7* Groundbreaking. Such a clean app. ### 5/5 — Beautiful, informative, and helpful! *2021-05-31, version 0.3.5* I’m so glad this app exists, I happily bought the subscription to offset all my carbon emissions for only $3/mo! ### 5/5 — Fantastic *2021-05-22, version 0.3.5* It’s a great app as it makes it easy to calculate your Carbon footprint and take actions to reduce it. ### 5/5 — fantastic! *2021-03-08, version 0.2.6* Using this app was a wake-up call. I’ve definitely been focusing on the wrong things! I love how it helps you focus on what’s important and reminds you along the way. ### 5/5 — Cute animations! *2021-03-08, version 0.2.6* Carbn has one of the easiest-to-use footprint calculators I’ve ever seen. Very user friendly and great graphics. I love the little colourful animation that would pop up after every page. ### 5/5 — amazing *2021-03-03, version 0.1.13* Wow its amazing 😍👌🏼 ### 5/5 — Amazing *2021-01-26, version 0.1.9* I am a climate activist and am trying to cut down may co2 usage. This is a great way to ## Frequently asked questions about Carbn ### What does Carbn do? Carbn helps you understand your carbon footprint and build green habits to reduce your environmental impact. It allows you to measure your emissions, adopt sustainable practices, and challenge friends to join you in fighting climate change. You can also offset unavoidable emissions through subscription-based projects. ### How do I calculate my carbon footprint with Carbn? You can calculate your carbon footprint by answering a few quick questions about your lifestyle within the app. Carbn will then provide a detailed breakdown of how your daily activities impact the planet, helping you identify areas for improvement. ### What are the 'Ten Green Habits'? The 'Ten Green Habits' feature guides you in adopting and sustaining eco-friendly practices. As you build and maintain these habits, you earn 'GreenMiles,' which can be used for bragging rights or exchanged for rewards from sustainability-focused brands. ### Can I offset my emissions with Carbn? Yes, Carbn offers an option to subscribe to projects that offset your unavoidable emissions. By supporting these projects, you can help remove an equivalent amount of emissions from the atmosphere and work towards becoming carbon neutral. ### Is Carbn available on all devices? The provided description does not specify compatibility with different operating systems or devices. However, it is designed for mobile use. ## Version history (last 1 release) ### 2.4.1 — 2023-02-05 We've built a huge set of features to bring Carbn to your workplace or school - check out the Feed to sign up your organisation! Additionally, customised profiles are here! Tap your profile icon in the top-left of the screen to see your personalised Carbn climate scorecard, and share your progress with your friends! Also, we've recently made some big changes to make your climate action journey more straightforward – and more fun. With Carbn, you will now: - Track your journey as you climb our martial arts-style belt system - Keep an eye on your progress using brand-new home-screen widgets - Understand your impact with points which represent your CO₂ savings - Learn what to do with personalized suggestions for reducing your impact With these changes you we hope you better understand your journey and feel incentivized to continue to make progress. ## Apps similar to Carbn | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ripplfect: Climate Action](https://appshunter.io/ios/app/ripplfect-climate-action/id1508317180) | 5.0 (30) | Free | Lifestyle | | [2030 or Bust](https://appshunter.io/ios/app/2030-or-bust/id1172286694) | 4.4 (13) | Free | Lifestyle | | [Changeit - Climate Change](https://appshunter.io/ios/app/changeit-climate-change/id1552425711) | 5.0 (1) | Free | Lifestyle | | [Econus - Live Sustainably](https://appshunter.io/ios/app/econus-live-sustainably/id1540004415) | 5.0 (16) | Free | Lifestyle | | [Viro - Climate Action](https://appshunter.io/ios/app/viro-climate-action/id6444683518) | 4.9 (17) | Free | Lifestyle | | [EcoHero - Eco Activity Tracker](https://appshunter.io/ios/app/ecohero-eco-activity-tracker/id1474213908) | 4.8 (25) | Free | Lifestyle | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*