# STF Kronos vs Fox River MedSpa

The clearest difference is update cadence: Fox River MedSpa at every 3 weeks against STF Kronos's every 2 months. STF Kronos's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

STF Kronos ships an update every 2 months, Fox River MedSpa every 3 weeks. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | STF Kronos | Fox River MedSpa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9 ratings)](https://appshunter.io/ios/app/stf-kronos/id1476804951/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 228 MB | 192 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [STUFFACTORY](https://appshunter.io/developer/1476804950) | [Fox River Spa & Salon](https://appshunter.io/developer/1618493942) |

## What reviewers say

### STF Kronos

[App page](https://appshunter.io/ios/app/stf-kronos/id1476804951)

This app syncs with your smartwatch to monitor your fitness performance across various sports. Track heart rate, steps, and sedentary periods to analyze your health metrics. It offers additional features based on your specific smartwatch model.

**Highlights:** Smartwatch synchronization, Sports performance monitoring, Heart rate tracking, Step counting, Sedentary period analysis, iOS Health App integration

**Features:** Vision Pro support

**In-app purchases:** none


### Fox River MedSpa

[App page](https://appshunter.io/ios/app/fox-river-medspa/id1618493940)

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

**In-app purchases:** none


## Frequently asked questions

### Is STF Kronos free?

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

### Is Fox River MedSpa free?

Fox River MedSpa is free to download, with no in-app purchases.

### Do STF Kronos or Fox River MedSpa have ads?

Neither STF Kronos nor Fox River MedSpa shows ads.

### Which is updated more often, STF Kronos or Fox River MedSpa?

STF Kronos ships an update every 2 months, and Fox River MedSpa every 3 weeks. Most recently, STF Kronos was updated on October 7, 2026 and Fox River MedSpa on October 10, 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.*