# STF Kronos vs Zim HIIT

The clearest difference is iOS requirement: STF Kronos at 13.0 against Zim HIIT's 15.0. 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.

## The numbers

| Metric | STF Kronos | Zim HIIT |
| --- | --- | --- |
| 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 | — |
| Monetization | Free | — |
| Size | 228 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STUFFACTORY](https://appshunter.io/developer/1476804950) | [Jose Gustavo Zimbron Lara](https://appshunter.io/developer/1456342274) |

## 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


### Zim HIIT

[App page](https://appshunter.io/ios/app/zim-hiit-interval-timer/id6781440977)

**Features:** macOS Compatibility, 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 Zim HIIT free?

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

### Do STF Kronos or Zim HIIT have ads?

Neither STF Kronos nor Zim HIIT shows ads.

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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.*