# Fartlek vs Burst

The clearest difference is in-app purchases: Burst at none against Fartlek's 2. Burst also leads on iOS requirement (16.2 vs 18.5). Fartlek's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Fartlek sells 2 in-app purchases, starting at $4.99 per month. Burst asks for nothing beyond the download.

Fartlek ships an update every 4 days, Burst weekly. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Fartlek | Burst |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Weekly |
| Size | 29 MB | 41 MB |
| Requires iOS | 18.5 | **16.2** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Axis SA](https://appshunter.io/developer/1621529800) | [Sebastian Orlowski](https://appshunter.io/developer/1884410907) |

## What reviewers say

### Fartlek

[App page](https://appshunter.io/ios/app/fartlek-interval-run-timer/id6752724674)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly plan | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


### Burst

[App page](https://appshunter.io/ios/app/burst-interval-timer/id6760428892)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fartlek free?

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

### Is Burst free?

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

### Do Fartlek or Burst have ads?

Burst shows ads; Fartlek does not.

### Which is updated more often, Fartlek or Burst?

Fartlek ships an update every 4 days, and Burst weekly. Most recently, Fartlek was updated on October 19, 2026 and Burst on October 18, 2026.

---

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