# Carbon vs Source Performance

The clearest difference is in-app purchases: Source Performance at none against Carbon's 9. Source Performance also leads on review sentiment (100% vs 80%) and rating (5.0 vs 4.8). Carbon's advantage is update cadence (weekly vs every 2 months) and ratings volume (8K vs 9). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Carbon sells 9 in-app purchases, starting at $11.99 per month. Source Performance asks for nothing beyond the download.

Source Performance holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Carbon has 8K ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 80% of Carbon's written reviews are positive against 100% of Source Performance's.

Carbon ships an update weekly, Source Performance every 2 months. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Carbon | Source Performance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (8K ratings)](https://appshunter.io/ios/app/carbon-macro-coach-and-tracker/id1437820611/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/source-performance/id6590602459/reviews)** |
| Number of ratings | **8K** | 9 |
| Positive reviews | 79.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#108** | — |
| Size | 106 MB | 180 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Reform LLC](https://appshunter.io/developer/1437820610) | [Source Performance LLC](https://appshunter.io/developer/1760047672) |

## What reviewers say

### Carbon

[App page](https://appshunter.io/ios/app/carbon-macro-coach-and-tracker/id1437820611)

**Currently charting:** #108 Top Grossing · Health & Fitness (US App Store)

This app provides personalized nutrition plans for weight loss, muscle gain, or maintenance. It adapts your plan as you progress and offers a comprehensive food tracker with a large database and barcode scanner. It supports various diet preferences and allows for custom meal planning.

**Highlights:** Personalized nutrition plans, Adaptive plan adjustments, Comprehensive food logging, Barcode scanner, Diet preference customization, Diet planner for flexible eating

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $11.99 | per month |
| Monthly Subscription | $11.99 | per month |
| Monthly Subscription | $11.99 | per month |
| Six Month Subscription | $59.99 | per 6 months |
| Six Month Subscription | $59.99 | per 6 months |
| Six Month Subscription | $59.99 | per 6 months |
| Yearly Subscription | $99.99 | per year |
| Yearly Subscription | $99.99 | per year |
| Yearly Subscription | $99.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 👍 Flexible and customizable
- 🔍 Accurate food database
- 💡 Helpful coaching and adjustments
- 🤝 Responsive customer support

**What reviewers complain about**

- 🐛 Limited food database for some regions
- 🤔 Strict adherence required for adjustments
- 🤷‍♀️ Lack of exercise tracking integration

**Reported bugs**

- Occasional app crashes or freezes
- Issues with resetting account data

**Requested features**

- Add water intake tracking
- Improve barcode scanning functionality
- Allow more flexibility in macro adjustments
- Integrate with fitness trackers


### Source Performance

[App page](https://appshunter.io/ios/app/source-performance/id6590602459)

This app provides personalized workout programs and tracks your fitness journey. Monitor workouts, nutrition, habits, and measurements with coach support. Achieve your health goals with guided exercises and progress tracking.

**Highlights:** Access and track training plans, Follow exercise and workout videos, Track meals and food choices, Monitor daily habits, Set and track health goals, Message your coach in real-time, Track body measurements and progress photos

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Carbon free?

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

### Is Source Performance free?

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

### Which has better reviews, Carbon or Source Performance?

Source Performance is rated higher. Carbon averages 4.8 out of 5 from 8K ratings, while Source Performance averages 5.0 from 9 ratings.

### Do Carbon or Source Performance have ads?

Neither Carbon nor Source Performance shows ads.

### Which is updated more often, Carbon or Source Performance?

Carbon ships an update weekly, and Source Performance every 2 months. Most recently, Carbon was updated on September 29, 2026 and Source Performance on September 18, 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.*