# KesselRUN Running vs IntervalRunner

The clearest difference is in-app purchases: KesselRUN Running at none against IntervalRunner's 2. KesselRUN Running also leads on iOS requirement (15.1 vs 26.0). IntervalRunner's advantage is update cadence (every 3 days vs every 9 days). On price, ads and device support there is nothing between them.

Both are free to download. IntervalRunner sells 2 in-app purchases, starting at $0.99 per month. KesselRUN Running asks for nothing beyond the download.

KesselRUN Running ships an update every 9 days, IntervalRunner every 3 days. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | KesselRUN Running | IntervalRunner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Size | 33 MB | 177 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [ThreeLees LLC](https://appshunter.io/developer/6778656941) | [JUKI JUNG](https://appshunter.io/developer/1212179274) |

## What reviewers say

### KesselRUN Running

[App page](https://appshunter.io/ios/app/kesselrun-running/id6781022500)

**In-app purchases:** none


### IntervalRunner

[App page](https://appshunter.io/ios/app/intervalrunner-pace-coach/id6817994370)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IntervalRunner Pro Monthly | $0.99 | per month |
| IntervalRunner Pro Annual | $9.99 | per year |


## Frequently asked questions

### Is KesselRUN Running free?

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

### Is IntervalRunner free?

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

### Do KesselRUN Running or IntervalRunner have ads?

Neither KesselRUN Running nor IntervalRunner shows ads.

### Which is updated more often, KesselRUN Running or IntervalRunner?

KesselRUN Running ships an update every 9 days, and IntervalRunner every 3 days. Most recently, KesselRUN Running was updated on October 6, 2026 and IntervalRunner on October 18, 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.*