# EcoHero vs Zero CO2

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.

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.

## The numbers

| Metric | EcoHero | Zero CO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (27 ratings)](https://appshunter.io/ios/app/ecohero-eco-activity-tracker/id1474213908/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/zero-co2-get-climate-neutral/id1534365588/reviews)** |
| Number of ratings | **27** | 4 |
| Positive reviews | 90.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 51 MB | 40 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [BytePioneers s. r. o.](https://appshunter.io/developer/1474208184) | [Caramba App Development](https://appshunter.io/developer/349530108) |

## What reviewers say

### EcoHero

[App page](https://appshunter.io/ios/app/ecohero-eco-activity-tracker/id1474213908)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GuardianHero Membership | $1.99 | per month |
| GuardianHero Membership | $2.99 | per month |
| GuardianHero Membership | $4.99 | per month |
| GuardianHero Membership | $9.99 | per month |
| GuardianHero Yearly Membership | $19.99 | per year |
| GuardianHero Yearly Membership | $29.99 | per year |
| GuardianHero Yearly Membership | $49.99 | per year |
| GuardianHero Yearly Membership | $99.99 | per year |


### Zero CO2

[App page](https://appshunter.io/ios/app/zero-co2-get-climate-neutral/id1534365588)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plant your tree | $0.99 | one-time |


## Frequently asked questions

### Is EcoHero free?

EcoHero is free to download, with in-app purchases available.

### Is Zero CO2 free?

Zero CO2 is free to download, with in-app purchases available.

### Which has better reviews, EcoHero or Zero CO2?

Zero CO2 is rated higher. EcoHero averages 4.8 out of 5 from 27 ratings, while Zero CO2 averages 5.0 from 4 ratings.

### Do EcoHero or Zero CO2 have ads?

Both EcoHero and Zero CO2 show ads.

### Which is updated more often, EcoHero or Zero CO2?

EcoHero ships an update monthly, and Zero CO2 every 3 days. Most recently, EcoHero was updated on November 3, 2026 and Zero CO2 on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*