# Carbon vs Function Health

The clearest difference is in-app purchases: Function Health at none against Carbon's 9. Function Health also leads on ratings volume (25K vs 8.1K). Carbon's advantage is review sentiment (79% vs 62%) and chart position (#104 vs unranked). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for Carbon against 4.9 for Function Health. Both are backed by a comparable volume of ratings — 8.1K and 25K respectively. Written reviews are what separate them: 79% of Carbon's written reviews are positive against 62% of Function Health's.

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Carbon | Function Health |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (8.1K ratings)](https://appshunter.io/ios/app/carbon-macro-coach-and-tracker/id1437820611/reviews) | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** |
| Number of ratings | 8.1K | **25K** |
| Positive reviews | **79.4% of reviews** | 61.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#104** | — |
| Size | 106 MB | 205 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Reform LLC](https://appshunter.io/developer/1437820610) | [Function Health](https://appshunter.io/developer/1715014524) |

## What reviewers say

### Carbon

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

**Currently charting:** #104 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


### Function Health

[App page](https://appshunter.io/ios/app/function-health/id6471280307)

Gain deep insights into your health with advanced lab testing, personalized protocols, and AI-powered chat. Understand your body's evolution and make informed changes with data-backed guidance. Includes options for advanced imaging and convenient blood draws.

**Highlights:** 160+ lab tests annually, Personalized health protocols, Private AI Chat for results, Advanced MRI & CT scan options, Home or office blood draws, Connect wearables, Upload health records

**Features:** Apple Wallet

**In-app purchases:** none

**What reviewers like**

- 🚀 Seamless process for blood tests and results
- 📊 Comprehensive health insights and tracking
- 🧠 Helpful clinician notes and recommendations
- 👍 User-friendly and visually appealing app
- 💰 Affordable compared to other options

**What reviewers complain about**

- 🔍 Lack of communication and support responsiveness
- 🐛 Some bugs and usability issues in the app

**Reported bugs**

- App sometimes redirects back to the home screen when trying to view results
- Occasional typos and formatting issues in the app

**Requested features**

- More customization options in the app settings
- Ability to print or export test results and recommendations
- Specific supplement recommendations rather than broad suggestions


## Frequently asked questions

### Is Carbon free?

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

### Is Function Health free?

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

### Which has better reviews, Carbon or Function Health?

Function Health is rated higher. Carbon averages 4.8 out of 5 from 8.1K ratings, while Function Health averages 4.9 from 25K ratings.

### Do Carbon or Function Health have ads?

Neither Carbon nor Function Health shows ads.

### Which is updated more often, Carbon or Function Health?

Carbon ships an update weekly, and Function Health weekly. Most recently, Carbon was updated on October 31, 2026 and Function Health on October 31, 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.*