# HIIT Interval Timer vs Kronos Studio

The clearest difference is ads: Kronos Studio at none against HIIT Interval Timer's shown. Kronos Studio also leads on update cadence (every 3 days vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. HIIT Interval Timer sells 1 one-off in-app purchase and Kronos Studio sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

HIIT Interval Timer ships an update fortnightly, Kronos Studio every 3 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HIIT Interval Timer | Kronos Studio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 102 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [tsyk-app](https://appshunter.io/developer/1586870924) | [Muller Labs LLC](https://appshunter.io/developer/1884923229) |

## What reviewers say

### HIIT Interval Timer

[App page](https://appshunter.io/ios/app/hiit-interval-timer-tabata/id1586870922)

This app provides customizable interval timers for various workout styles like HIIT, Tabata, EMOM, and AMRAP. Track your progress, set weekly goals, and enjoy estimated calorie burn with shareable workout summaries. It offers a free version with core features and a Pro version for enhanced customization and an ad-free experience.

**Highlights:** Customizable interval timers, Multiple workout modes (HIIT, Tabata, EMOM, AMRAP), Weekly goal tracking, Estimated calorie burn, Workout sharing options, Sound and haptic cues, Customizable themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HIIT Timer Pro | $4.99 | one-time |


### Kronos Studio

[App page](https://appshunter.io/ios/app/kronos-studio/id6762472031)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kronos Pro Monthly | $8.99 | per month |
| Kronos Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is HIIT Interval Timer free?

HIIT Interval Timer is free to download, with in-app purchases available.

### Is Kronos Studio free?

Kronos Studio is free to download, with in-app purchases available.

### Do HIIT Interval Timer or Kronos Studio have ads?

HIIT Interval Timer shows ads; Kronos Studio does not.

### Which is updated more often, HIIT Interval Timer or Kronos Studio?

HIIT Interval Timer ships an update fortnightly, and Kronos Studio every 3 days. Most recently, HIIT Interval Timer was updated on October 30, 2026 and Kronos Studio on October 28, 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.*