EcoHero vs Zero CO2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EcoHero
Track your daily eco-friendly activities and visualize their positive impact on the environment. Learn sustainable living tips, reduce your footprint, and inspire others to join the movement.
- Track eco activities (meals, transport, plastic)
- Visualize water, land, CO2, and plastic savings
- Eco Calendar for sustainable days
- Learn about environmental impact of daily habits
- Share activities and motivate others
- Eat greener and reduce plastic waste
- Travel eco-friendly
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Small changes in your everyday decisions can have a significant impact on the environment. Track activities beneficial for the planet and see your impact. TRACK YOUR ECO ACTIVITIES & SEE YOUR IMPACT • Track your meals, transport, plastic usage and all kinds of eco activities. • See the amounts of Water, Land, CO2 and Plastics you are saving/reducing. • Fill your eco Calendar with Vegan, Vegetarian, Car-free or Plastic-free days. • Check your monthly summaries to see your overall contribution and progress. LEARN HOW TO LIVE MORE SUSTAINABLE Learn how modes of transport, meals you consume and other daily activities differ in their environmental impact. • Learn how much CO2 is produced and how much water and land consumed by your daily activities. • See how little changes in your daily habits can make a huge difference in your footprint. • Read "Did you know?" and “Interesting facts” and widen your environmental knowledge. INSPIRE OTHERS Encourage each other in caring about the planet. Share your activities and motivate your friends or other users. • Your tracked activities are posted in your feed, visible for your followers. • Share your activities and summaries further on your favorite social networks, e.g. Facebook, Instagram, or Twitter. EAT GREENER Replace your meat meals with more eco-friendly options and see your impact. • Track the amounts of water, land and CO2 saved/reduced per portion. • See the footprint difference between vegan, vegetarian, fish and meat meals. • Complete vegan and vegetarian weekly challenges. REDUCE PLASTIC WASTE Replace single-use plastics with their reusable alternatives. • Track your usage of reusable cups, bottles, bags or lunch boxes. • Complete plastic-free challenges or try plastic-free shopping. TRAVEL ECO FRIENDLY Leave your car at home and try an eco-friendlier way of transport. • Replace your car by train, bus or public transport and see how much you've reduced your carbon footprint. • Already living car-free? Walk or bike and compare carbon footprint to other modes of transport. • Complete the “car-free week” challenge and receive an extra badge. Terms of service: https://ecohero.app/terms-of-service/ Privacy policy: https://ecohero.app/privacy-policy/
Zero CO2
This app tracks your phone's carbon footprint from data usage and helps you offset emissions by planting trees. Monitor your CO2 output and see how your reforestation efforts compensate for it, receiving certificates for each planted tree.
- Monitors phone carbon footprint
- Tracks CO2 emissions from data usage
- Compensates emissions by planting trees
- Visualizes CO2 emissions and tree compensation
- Provides certificates for planted trees
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ZeroCO2 monitors your phone's carbon footprint and keeps track of the CO2 emissions from your device. These CO2 emissions come from the data usage of your device. All cloud-services, emails, search queries, social network activities etc, are facilitated by large Data Centers, which consume large amounts of electricity to keep your data streams flowing. Over its lifetime, an iPhone can emit up to 60 kilograms of CO2. This electricity typically does not come 100% from green sources, and therefore leads to CO2 emissions. That's equivalent to more than 300 kilometers driving in a petrol-fueled car. Do you want your phone to become CO2-neutral? Then use the app to plant trees to compensate your emissions! With its comprehensive graphs, you can easily monitor how much CO2 you emit, and how your planted trees compensate these emissions. With every planted tree, you receive a certificate that proves the authenticity and shows the location of the planted tree. Prevent climate change, and become a carbon-neutral iPhone user! Note: Trees are planted by our partner Tree-Nation, the worldwide platform to reforest the world and fight climate change. All trees planted by Tree-Nation are certified by the best in class and most renowned certification standards that exist in this field. For this, Tree-Nation works with third-party certification organizations such as VCS, Gold Standard, and Plan Vivo.
Screenshots
Verdict
The clearest difference is update cadence: Zero CO2 at every 3 days against EcoHero's monthly. Zero CO2 also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 91%). EcoHero's advantage is ratings volume (27 vs 4) and iOS requirement (12.0 vs 15.5). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. EcoHero sells 8 in-app purchases, starting at $1.99 per month and Zero CO2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Zero CO2 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: EcoHero has 27 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 91% of EcoHero's written reviews are positive against 100% of Zero CO2's.
EcoHero ships an update monthly, Zero CO2 every 3 days. Both last shipped on November 3, 2026.
| Parameter | EcoHero | Zero CO2 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (27 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 90.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 4 |
| Update frequency | Monthly | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 51 MB | 40 MB |
| Age rating | 4+ | 12+ |
| Developer | BytePioneers s. r. o. | Caramba App Development |
Customer experience
EcoHero
Zero CO2
In-app purchases
EcoHero
- GuardianHero Membership$1.991 Month
- GuardianHero Membership$2.991 Month
- GuardianHero Membership$4.991 Month
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- GuardianHero Membership$9.991 Month
- GuardianHero Yearly Membership$19.991 Year
- GuardianHero Yearly Membership$29.991 Year
- GuardianHero Yearly Membership$49.991 Year
- GuardianHero Yearly Membership$99.991 Year
Zero CO2
- Plant your tree$0.99








