# Function Health vs Prove It

The clearest difference is review sentiment: Function Health at 62% against Prove It's 9%. Function Health also leads on rating (4.9 vs 4.4) and in-app purchases (none vs 25). Prove It's advantage is device support (3 vs 1). On price, ratings volume, update cadence and iOS requirement there is nothing between them.

Both are free to download. Prove It sells 25 in-app purchases, starting at $4.99 per 7 days. Function Health asks for nothing beyond the download.

Function Health holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 25K and 16K respectively. Written reviews point the same way: 62% of Function Health's written reviews are positive against 9% of Prove It's.

Function Health ships an update weekly, Prove It every 6 days. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Function Health | Prove It |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** | [4.4 (16K ratings)](https://appshunter.io/ios/app/prove-it-supplement-scanner/id6740288836/reviews) |
| Number of ratings | **25K** | 16K |
| Positive reviews | **61.9% of reviews** | 9.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 201 MB | 132 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Control. Alt. Delete. LLC](https://appshunter.io/developer/1762687184) |

## What reviewers say

### Function Health

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

Take control of your health with comprehensive lab testing, personalized protocols, and AI-powered insights. Understand your body's data, track changes over time, and make informed decisions for long-term wellness. Connect wearables and upload records for a complete health picture.

**Highlights:** 160+ lab tests annually, Personalized health protocols, Private AI Chat for results, Connect health wearables, Advanced MRI & CT scans, 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


### Prove It

[App page](https://appshunter.io/ios/app/prove-it-supplement-scanner/id6740288836)

Empower your supplement choices with science-backed reviews. Instantly scan barcodes or search our database to understand ingredient efficacy, safety, and research quality. Make informed decisions about your health investments.

**Highlights:** Evidence-based analysis, Barcode scanning, Extensive supplement database, Ingredient efficacy and safety, Research quality assessment, Informed decision making

**Features:** Apple Wallet, Vision Pro support

**In-app purchases (25)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription with Trial | $4.99 | per 7 days |
| Weekly Subscription | $4.99 | per 7 days |
| weekly | $7.99 | per 7 days |
| monthly subscription | $9.99 | per month |
| Yearly Subscription | $14.99 | per year |
| yearly subscription | $19.99 | per year |
| Pro Subscription | $25.99 | per 3 months |
| Food and Skincare Health Plan | $29.99 | per year |
| Prove It Quarterly | $29.99 | per 3 months |
| Yearly Subscription | $29.99 | per year |
| Pro Subscription | $32.49 | per 3 months |
| Yearly Subscription | $34.99 | per year |
| Yearly Subscription | $35.90 | per year |
| Prove It Quarterly | $39.99 | per 3 months |
| Yearly Subscription | $39.99 | per year |
| Yearly Subscription | $47.90 | per year |
| Yearly Subscription with Trial | $49.99 | per year |
| Yearly 49.99 | $49.99 | per year |
| Prove It Subscription | $59.99 | per 3 months |
| yearly subscription | $59.99 | per year |
| yearly subscription | $69.99 | per year |
| Yearly Subscription | $71.90 | per year |
| Yearly Subscription | $83.90 | per year |
| Yearly Subscription | $95.90 | per year |
| yearly subscription | $99.99 | per year |

**What reviewers like**

- 🚀 Highly informative
- 👍 Useful information
- 👍 Simple and straightforward
- 👍 Convenient and helpful
- 👍 Personalized recommendations

**What reviewers complain about**

- 🐛 Incomplete database
- 🐛 Scanning issues

**Reported bugs**

- Scanning errors
- Incompatibility with some supplements

**Requested features**

- Ability to manually add supplements
- Reduce subscription cost


## Frequently asked questions

### Is Function Health free?

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

### Is Prove It free?

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

### Which has better reviews, Function Health or Prove It?

Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Prove It averages 4.4 from 16K ratings.

### Do Function Health or Prove It have ads?

Prove It shows ads; Function Health does not.

### Which is updated more often, Function Health or Prove It?

Function Health ships an update weekly, and Prove It every 6 days. Most recently, Function Health was updated on September 25, 2026 and Prove It on September 24, 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.*