# The Diet Doc Fit Lab vs Pro Performance

The Diet Doc Fit Lab and Pro Performance are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

The Diet Doc Fit Lab ships an update every 5 weeks, Pro Performance every 3 weeks. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | The Diet Doc Fit Lab | Pro Performance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (16 ratings)](https://appshunter.io/ios/app/pro-performance-rx/id6749880247/reviews)** |
| Number of ratings | — | **16** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 119 MB | 119 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nautilus Connection, LLC](https://appshunter.io/developer/1831850077) | [Smart Health Clubs](https://appshunter.io/developer/1333435433) |

## What reviewers say

### The Diet Doc Fit Lab

[App page](https://appshunter.io/ios/app/the-diet-doc-fit-lab/id6749716721)

**Features:** Apple Wallet

**In-app purchases:** none


### Pro Performance

[App page](https://appshunter.io/ios/app/pro-performance-rx/id6749880247)

This app serves as a digital companion for members of a fitness center, providing easy club entry and access to class schedules. Users can browse available classes, log their attendance, and receive important updates via push notifications to stay organized with their fitness journey.

**Highlights:** Digital club entry, Class browsing, Attendance logging, Push notifications, Fitness activity tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is The Diet Doc Fit Lab free?

The Diet Doc Fit Lab is free to download, with no in-app purchases.

### Is Pro Performance free?

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

### Do The Diet Doc Fit Lab or Pro Performance have ads?

Neither The Diet Doc Fit Lab nor Pro Performance shows ads.

### Which is updated more often, The Diet Doc Fit Lab or Pro Performance?

The Diet Doc Fit Lab ships an update every 5 weeks, and Pro Performance every 3 weeks. Most recently, The Diet Doc Fit Lab was updated on November 8, 2026 and Pro Performance on October 30, 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.*