# JouleBug vs Nergy

The clearest difference is rating: Nergy at 5.0 against JouleBug's 4.4. Nergy also leads on update cadence (weekly vs every 3 months). JouleBug's advantage is ratings volume (41 vs 1) and monetization model (free vs ad-supported). On price, ads, in-app purchases and device support there is nothing between them.

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

Nergy 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.

JouleBug ships an update every 3 months, Nergy weekly. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | JouleBug | Nergy |
| --- | --- | --- |
| 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/nergy/id6758839128/reviews)** |
| Number of ratings | **41** | 1 |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | **Free** | Ad-supported |
| Size | 70 MB | 902 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Cleanbit Systems, Inc.](https://appshunter.io/developer/391199309) | [Nergy Technologies FZ-LLC](https://appshunter.io/developer/1875244816) |

## 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


### Nergy

[App page](https://appshunter.io/ios/app/nergy/id6758839128)

This app allows you to monitor your brain activity and mental states like stress and focus. Engage in biofeedback training and access relaxation experiences to enhance cognitive performance. It also enables mind-controlled interaction with VR and gaming consoles.

**Highlights:** Brain activity monitoring, Stress and fatigue tracking, Biofeedback neurotraining, Relaxation and meditation experiences, Mind-controlled VR/gaming interaction, Cognitive performance improvement

**In-app purchases:** none


## Frequently asked questions

### Is JouleBug free?

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

### Is Nergy free?

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

### Which has better reviews, JouleBug or Nergy?

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

### Do JouleBug or Nergy have ads?

Neither JouleBug nor Nergy shows ads.

### Which is updated more often, JouleBug or Nergy?

JouleBug ships an update every 3 months, and Nergy weekly. Most recently, JouleBug was updated on September 18, 2026 and Nergy on September 20, 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.*