# JouleBug vs Kora Sustainability

The clearest difference is in-app purchases: JouleBug at none against Kora Sustainability's 5. JouleBug also leads on rating (4.4 vs 4.0) and ratings volume (41 vs 3). Kora Sustainability's advantage is update cadence (fortnightly vs every 3 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Kora Sustainability sells 5 in-app purchases, starting at $1.99 per month. JouleBug asks for nothing beyond the download.

JouleBug holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: JouleBug has 41 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 70% of JouleBug's written reviews are positive against 75% of Kora Sustainability's, so the app with the better star average is not the one people write more warmly about.

JouleBug ships an update every 3 months, Kora Sustainability fortnightly. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | JouleBug | Kora Sustainability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (41 ratings)](https://appshunter.io/ios/app/joulebug-legacy/id391199306/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/kora-sustainability/id1483753003/reviews) |
| Number of ratings | **41** | 3 |
| Positive reviews | 70.0% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 70 MB | 108 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Cleanbit Systems, Inc.](https://appshunter.io/developer/391199309) | [Kora Sustainability Solution SIA](https://appshunter.io/developer/1475239838) |

## 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


### 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 |


## Frequently asked questions

### Is JouleBug free?

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

### Is Kora Sustainability free?

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

### Which has better reviews, JouleBug or Kora Sustainability?

JouleBug is rated higher. JouleBug averages 4.4 out of 5 from 41 ratings, while Kora Sustainability averages 4.0 from 3 ratings.

### Do JouleBug or Kora Sustainability have ads?

Neither JouleBug nor Kora Sustainability shows ads.

### Which is updated more often, JouleBug or Kora Sustainability?

JouleBug ships an update every 3 months, and Kora Sustainability fortnightly. Most recently, JouleBug was updated on September 30, 2026 and Kora Sustainability on October 6, 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.*