# Fartlek Interval Trainer vs Welltra

The clearest difference is in-app purchases: Welltra at none against Fartlek Interval Trainer's 4. Welltra also leads on update cadence (daily vs weekly) and iOS requirement (13.4 vs 26.0). 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. Welltra asks for nothing beyond the download.

Fartlek Interval Trainer ships an update weekly, Welltra daily. The most recent releases landed on October 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Fartlek Interval Trainer | Welltra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/welltra/id6503694380/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Freemium | **Free** |
| Size | 85 MB | 32 MB |
| Requires iOS | 26.0 | **13.4** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Richard English](https://appshunter.io/developer/1537547687) | [NAMBOR TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1619405086) |

## 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 |


### Welltra

[App page](https://appshunter.io/ios/app/welltra/id6503694380)

This app helps athletes and coaches manage training, track wellness, and report injuries. It provides visual data insights on workload and readiness, offering personalized suggestions for performance optimization and injury prevention.

**Highlights:** Daily wellness tracking, Detailed training logs, Injury reporting, Visual data insights (ACWR, readiness), Personalized wellness suggestions, Session planning for coaches, Comprehensive athlete reports

**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 Welltra free?

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

### Do Fartlek Interval Trainer or Welltra have ads?

Neither Fartlek Interval Trainer nor Welltra shows ads.

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

Fartlek Interval Trainer ships an update weekly, and Welltra daily. Most recently, Fartlek Interval Trainer was updated on October 9, 2026 and Welltra on September 23, 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.*