# JouleBug vs NMF.earth

The clearest difference is rating: NMF.earth at 5.0 against JouleBug's 4.4. NMF.earth also leads on review sentiment (100% vs 70%). JouleBug's advantage is ratings volume (41 vs 1) and iOS requirement (13.0 vs 15.1). On price, update cadence, 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 holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: JouleBug has 41 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 70% of JouleBug's written reviews are positive against 100% of NMF.earth's.

JouleBug ships an update every 3 months, NMF.earth every 6 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | JouleBug | NMF.earth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (41 ratings)](https://appshunter.io/ios/app/joulebug-legacy/id391199306/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nmfearth/id1494561829/reviews)** |
| Number of ratings | **41** | 1 |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 70 MB | 42 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Cleanbit Systems, Inc.](https://appshunter.io/developer/391199309) | [Pierre Bresson](https://appshunter.io/developer/886617892) |

## What reviewers say

### JouleBug

[App page](https://appshunter.io/ios/app/joulebug-legacy/id391199306)

This app is designed to enhance workplace experiences by fostering environmental and social stewardship through collective action. It offers tailored sustainability programs, tracks impact metrics, and encourages employee engagement through challenges and social interactions.

**Highlights:** Employee Engagement Hub, Tailored Sustainability Programs, Metrics for Impactful Insights, Inspirational Challenges, Dynamic Social Interactions

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Great concept and idea
- 👍 Fun and engaging
- 🌍 Motivates environmental action
- 💡 Educational and informative
- 🤝 Social and competitive aspect

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 App is buggy
- 🐛 Server errors
- 🐛 Incomplete features/buttons
- 🐛 Outdated content (challenges, actions)

**Reported bugs**

- App closes when buzzing
- Server error prevents usage
- App won't load after initial setup
- Login errors, requires Facebook
- Accidental buzzes cannot be deleted

**Requested features**

- Add more sustainable actions/challenges
- Update book and movie options
- Add a clothing section with sustainable options
- Allow deletion of unintentional buzzes
- Favorite/categorize activities


### 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


## Frequently asked questions

### Is JouleBug free?

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

### Is NMF.earth free?

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

### Which has better reviews, JouleBug or NMF.earth?

NMF.earth is rated higher. JouleBug averages 4.4 out of 5 from 41 ratings, while NMF.earth averages 5.0 from 1 ratings.

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

Neither JouleBug nor NMF.earth shows ads.

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

JouleBug ships an update every 3 months, and NMF.earth every 6 weeks. Most recently, JouleBug was updated on November 1, 2026 and NMF.earth 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.*