# RUN interval vs Kronos Studio

The clearest difference is update cadence: Kronos Studio at every 2 days against RUN interval's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RUN interval sells 2 one-off in-app purchases 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.

RUN interval ships an update every 3 months, Kronos Studio every 2 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | RUN interval | Kronos Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1K ratings)](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 77.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 97 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [CAN YOU HEAR ME SOFTWARE](https://appshunter.io/developer/711042540) | [Muller Labs LLC](https://appshunter.io/developer/1884923229) |

## What reviewers say

### RUN interval

[App page](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752)

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

**Highlights:** Customizable interval sessions, Time and distance targets, Distance Goal option, Audio and visual feedback, Detailed run summaries, Apple Watch app, Strava sharing

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full RUN interval | $1.99 | one-time |
| The full RUN interval | $3.99 | 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 RUN interval free?

RUN interval 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 RUN interval or Kronos Studio have ads?

Neither RUN interval nor Kronos Studio shows ads.

### Which is updated more often, RUN interval or Kronos Studio?

RUN interval ships an update every 3 months, and Kronos Studio every 2 days. Most recently, RUN interval was updated on October 12, 2026 and Kronos Studio on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*