# Fartlek Interval Trainer vs 8Well

The clearest difference is in-app purchases: 8Well at none against Fartlek Interval Trainer's 4. 8Well also leads on iOS requirement (11.0 vs 26.0). Fartlek Interval Trainer's advantage is update cadence (every 9 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Fartlek Interval Trainer sells 4 in-app purchases, starting at $0.99 per month. 8Well asks for nothing beyond the download.

Fartlek Interval Trainer ships an update every 9 days, 8Well every 4 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Fartlek Interval Trainer | 8Well |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/8well/id1613254093/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 4 months |
| Monetization | Freemium | **Free** |
| Size | 86 MB | 105 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Richard English](https://appshunter.io/developer/1537547687) | [Doing Well Group LLC](https://appshunter.io/developer/1613254095) |

## What reviewers say

### Fartlek Interval Trainer

[App page](https://appshunter.io/ios/app/fartlek-interval-trainer/id1537547685)

This running app automatically detects spontaneous intervals during Fartlek runs, providing live color-coded feedback on your effort. It also functions as a powerful timer for structured workouts like HIIT and Tabata, offering detailed metrics and syncing with Strava and Apple Health.

**Highlights:** Auto-detection of Fartlek intervals, Live color-coded effort feedback, Structured workout timer (HIIT, Tabata), Detailed interval metrics, Strava and Apple Health integration, Advanced effort level detection

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $6.99 | per year |
| RemoveAds | $0.99 | one-time |
| Lifetime | $14.99 | one-time |


### 8Well

[App page](https://appshunter.io/ios/app/8well/id1613254093)

Book small group strength training and personal training sessions with a wellness company focused on physical and personal improvement. View the upcoming schedule and reserve your spot directly through the app.

**Highlights:** Book strength training classes, Book personal training sessions, View upcoming class schedule, Wellness company services, Fitness and personal development

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fartlek Interval Trainer free?

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

### Is 8Well free?

8Well is free to download, with no in-app purchases.

### Do Fartlek Interval Trainer or 8Well have ads?

Neither Fartlek Interval Trainer nor 8Well shows ads.

### Which is updated more often, Fartlek Interval Trainer or 8Well?

Fartlek Interval Trainer ships an update every 9 days, and 8Well every 4 months. Most recently, Fartlek Interval Trainer was updated on November 3, 2026 and 8Well on November 3, 2026.

---

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