# MetabolicTracker vs Sauna Trainer

The clearest difference is in-app purchases: MetabolicTracker at none against Sauna Trainer's 1. Sauna Trainer's advantage is iOS requirement (17.0 vs 26.2). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Sauna Trainer sells 1 in-app purchase, starting at $3.99 per month. MetabolicTracker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for MetabolicTracker against 5.0 for Sauna Trainer. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

MetabolicTracker ships an update every 10 days, Sauna Trainer weekly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MetabolicTracker | Sauna Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/metabolictracker/id6758915298/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/sauna-trainer/id6767308859/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 4 MB | 149 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [William Kastner](https://appshunter.io/developer/1875727802) | [Fractelle Inc](https://appshunter.io/developer/1896464296) |

## What reviewers say

### MetabolicTracker

[App page](https://appshunter.io/ios/app/metabolictracker/id6758915298)

Track your ketogenic diet, carb intake, weight, and mood to understand how these factors influence each other. Gain insights into your metabolic health and make informed decisions about your diet and lifestyle.

**Highlights:** Ketogenic diet tracking, Carb intake monitoring, Weight tracking, Mood logging, Metric correlation analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Sauna Trainer

[App page](https://appshunter.io/ios/app/sauna-trainer/id6767308859)

Enhance your sauna experience with guided sessions and performance tracking. Features a free timer and basic voice guidance, with optional Pro tools for advanced audio, history, and insights.

**Highlights:** Free sauna timer, Basic voice guidance, Full guided audio programs, Saved session history, Progress tracking, Wellness insights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sauna Trainer Pro Monthly | $3.99 | per month |


## Frequently asked questions

### Is MetabolicTracker free?

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

### Is Sauna Trainer free?

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

### Which has better reviews, MetabolicTracker or Sauna Trainer?

MetabolicTracker and Sauna Trainer are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do MetabolicTracker or Sauna Trainer have ads?

Neither MetabolicTracker nor Sauna Trainer shows ads.

### Which is updated more often, MetabolicTracker or Sauna Trainer?

MetabolicTracker ships an update every 10 days, and Sauna Trainer weekly. Most recently, MetabolicTracker was updated on October 31, 2026 and Sauna Trainer on November 5, 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.*