# Kora Sustainability vs Zero CO2

The clearest difference is rating: Zero CO2 at 5.0 against Kora Sustainability's 4.0. Zero CO2 also leads on update cadence (every 3 days vs fortnightly) and review sentiment (100% vs 75%). Kora Sustainability's advantage is ads (none vs shown). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Kora Sustainability sells 5 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 4.0. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 75% of Kora Sustainability's written reviews are positive against 100% of Zero CO2's.

Kora Sustainability ships an update fortnightly, Zero CO2 every 3 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Kora Sustainability | Zero CO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/kora-sustainability/id1483753003/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/zero-co2-get-climate-neutral/id1534365588/reviews)** |
| Number of ratings | 3 | **4** |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 108 MB | 40 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Kora Sustainability Solution SIA](https://appshunter.io/developer/1475239838) | [Caramba App Development](https://appshunter.io/developer/349530108) |

## What reviewers say

### Kora Sustainability

[App page](https://appshunter.io/ios/app/kora-sustainability/id1483753003)

Track your environmental impact by measuring sustainable lifestyle choices like mobility, energy use, and purchasing habits. Earn rewards for eco-friendly actions and reduce your carbon footprint through a combination of moral and financial incentives.

**Highlights:** Track sustainable lifestyle choices, Measure impact on the planet, Earn rewards for eco-friendly actions, Reduce CO2 emissions, Compare progress with goals and others, Integrates with Apple Health for steps and distance

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Adventurer monthly | $1.99 | per month |
| Sprout Offset Subscription | $3.99 | per month |
| Tree Offset Subscription | $7.99 | per month |
| Forest Offset Subscription | $15.99 | per month |
| Adventurer yearly | $39.99 | 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 Kora Sustainability free?

Kora Sustainability 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, Kora Sustainability or Zero CO2?

Zero CO2 is rated higher. Kora Sustainability averages 4.0 out of 5 from 3 ratings, while Zero CO2 averages 5.0 from 4 ratings.

### Do Kora Sustainability or Zero CO2 have ads?

Zero CO2 shows ads; Kora Sustainability does not.

### Which is updated more often, Kora Sustainability or Zero CO2?

Kora Sustainability ships an update fortnightly, and Zero CO2 every 3 days. Most recently, Kora Sustainability 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.*