# Fartlek vs GIMNASIO STRONG

The clearest difference is in-app purchases: GIMNASIO STRONG at none against Fartlek's 3. GIMNASIO STRONG also leads on iOS requirement (16.0 vs 18.5). Fartlek's advantage is update cadence (every 4 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Fartlek sells 3 in-app purchases, starting at $1.99 per 7 days. GIMNASIO STRONG asks for nothing beyond the download.

Fartlek ships an update every 4 days, GIMNASIO STRONG every 3 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Fartlek | GIMNASIO STRONG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Size | 29 MB | 56 MB |
| Requires iOS | 18.5 | **16.0** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Axis SA](https://appshunter.io/developer/1621529800) | [Sergio Andres Soto Arroyave](https://appshunter.io/developer/1705489729) |

## What reviewers say

### Fartlek

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

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $1.99 | per 7 days |
| Monthly premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


### GIMNASIO STRONG

[App page](https://appshunter.io/ios/app/gimnasio-strong/id6759133985)

**In-app purchases:** none


## Frequently asked questions

### Is Fartlek free?

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

### Is GIMNASIO STRONG free?

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

### Do Fartlek or GIMNASIO STRONG have ads?

Neither Fartlek nor GIMNASIO STRONG shows ads.

### Which is updated more often, Fartlek or GIMNASIO STRONG?

Fartlek ships an update every 4 days, and GIMNASIO STRONG every 3 months. Most recently, Fartlek was updated on October 30, 2026 and GIMNASIO STRONG on October 31, 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.*