# NMF.earth vs Turtle

The clearest difference is update cadence: Turtle at every 2 weeks against NMF.earth's every 6 weeks. On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NMF.earth ships an update every 6 weeks, Turtle every 2 weeks. The most recent releases landed on June 4, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | NMF.earth | Turtle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nmfearth/id1494561829/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 42 MB | 77 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pierre Bresson](https://appshunter.io/developer/886617892) | [Julien Kritter](https://appshunter.io/developer/1806288942) |

## What reviewers say

### NMF.earth

[App page](https://appshunter.io/ios/app/nmfearth/id1494561829)

Track and decrease your environmental impact by understanding your carbon footprint. Set personal emission goals and monitor your progress monthly to stay within your budget.

**Highlights:** Calculate CO2 emissions, Define carbon budget, Track monthly limits, Reduce carbon footprint, Actionable insights

**Features:** macOS Compatibility

**In-app purchases:** none


### Turtle

[App page](https://appshunter.io/ios/app/turtle-mon-empreinte-carbone/id6744149120)

This app helps you understand and reduce your environmental impact by tracking daily activities like meals, travel, and purchases. It offers challenges, badges, and progress tracking to encourage sustainable habits. You can also compare your footprint to global averages and discover eco-friendly brands.

**Highlights:** Add daily activities (meals, travel, purchases), Discover climate impact of activities, Take on challenges to reduce footprint, Unlock badges and track progress, Compare to national and global averages, Discover eco-responsible brands, Organize team challenges for companies

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NMF.earth free?

NMF.earth is free to download, with no in-app purchases.

### Is Turtle free?

Turtle is free to download, with no in-app purchases.

### Do NMF.earth or Turtle have ads?

Neither NMF.earth nor Turtle shows ads.

### Which is updated more often, NMF.earth or Turtle?

NMF.earth ships an update every 6 weeks, and Turtle every 2 weeks. Most recently, NMF.earth was updated on June 4, 2026 and Turtle on July 7, 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.*