# Fartlek Interval Trainer — Get insights into your workout

> Automatic interval detection and structured workout timer for runners. (iPhone/iPad app by Richard English.)

- Source: https://appshunter.io/ios/app/fartlek-interval-trainer/id1537547685 (this page in markdown: same URL + `.md`)
- Developer: [Richard English](https://appshunter.io/developer/1537547687)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 77 MB
- Languages: American English
- Released: 2020-11-08
- Data updated: 2026-09-07
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/fartlek-interval-trainer/id1537547685/reviews.md

## What is Fartlek Interval Trainer?

Build the interval workout you want. Stay on target while you train. Then learn from every session.

FiT is an interval timer and training companion for runners on Apple Watch and iPhone. Create classic intervals, HIIT and Tabata workouts—or run freely with automatic Fartlek interval detection.

CREATE WORKOUTS YOUR WAY

Build simple work-and-rest sessions or advanced workouts with warm-ups, cooldowns, repeated sets and multiple effort levels. FiT makes even complex sessions clear and easy to follow.

STAY ON TARGET

Color-coded feedback shows whether you’re on pace. Voice, audio and haptic alerts help you respond without constantly checking your device.

The Dual Progress Ring shows both your current interval and your overall workout progress at a glance.

FARTLEK WITHOUT THE BUTTONS

Switch to Fartlek mode and run by feel. FiT detects changes in your speed and automatically converts them into recorded intervals.

No reaching for your device. No tapping between efforts. Just run.

LEARN FROM EVERY WORKOUT

See how each interval performed with detailed pace, heart rate, cadence and distance metrics.

Personalized coaching insights use your workout data to highlight meaningful patterns and offer practical recommendations for future sessions.

FiT Pro adds workout comparisons and historical trends, helping you understand how your performance changes over time.

ADVANCED EFFORT TRACKING

Advanced workouts can distinguish between sprint, hard, moderate and easy efforts, helping you create more varied sessions and analyze every effort afterward.

APPLE WATCH, IPHONE AND YOUR FITNESS APPS

Train with Apple Watch or iPhone, save completed workouts to Apple Health and sync your sessions with Strava.

KEY FEATURES

• Flexible interval timer for running, HIIT and Tabata
• Automatic Fartlek interval detection
• Dual-ring live workout progress
• Color-coded pace and effort feedback
• Voice, audio and haptic alerts
• Detailed pace, heart rate, cadence and distance metrics
• Performance tracking for every interval
• Personalized coaching insights for every workout
• FiT Pro workout comparisons and historical trends
• Sprint, hard, moderate and easy effort levels
• Apple Health and Strava integration
• Light and dark appearance

Run free. Train smart. Learn from every session.

SUBSCRIPTION TERMS

FiT offers an optional auto-renewable subscription. Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your Apple ID account settings.

Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy:
https://www.iubenda.com/privacy-policy/39192677

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual | $6.99 | per year |
| Monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| RemoveAds | $0.99 | one-time |
| Lifetime | $14.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/fartlek-interval-trainer/id1537547685/reviews.md

### 4/5 — Basic but useful

*2024-09-01, version 1.2.1*

I have used this at various points over the last few years. Definitely helped with stamina and overall speed. Started using it again and it does not seem to sync with Apple Health / Fitness apps despite having all permissions to do so. Can I presume this app is no longer being developed / supported?

### 5/5 — Amazing

*2021-12-27, version 1.2.1*

I absolutely love the app and really recommend it. I found it super helpful for my running and has improved my stamina massively!

### 2/5 — Can’t listen to music on your phone and get notifications for when your next set is up.

*2021-12-25*

Wouldn’t recommend

**Developer response:** Hi Mariam

Thank you for highlighting this gap. The app has been recently updated and now supports music from other apps while exercising. This includes the ability to hear notifications while music is playing - these can also be silenced in the Settings page.

I am actively working on improving the app, I hope you will return to using it again and do let me know if there are any other features or changes you would like to see.

Best regards 

Richard

### 5/5 — At last

*2020-11-14, version 1.0.2*

I’ve been waiting for an app like this for ages. It’s perfect for bringing some structure to my run/walk exercise.

## Frequently asked questions about Fartlek Interval Trainer

### What is Fartlek Interval Trainer?

Fartlek Interval Trainer is a running app designed to automatically detect spontaneous intervals during Fartlek runs and provide structured workout timing for HIIT and Tabata. It offers live feedback and detailed metrics.

### Does Fartlek Interval Trainer have ads?

No, Fartlek Interval Trainer does not contain advertisements. It is a completely ad-free experience for users.

### What devices does Fartlek Interval Trainer support?

Fartlek Interval Trainer is available for both iPhone and Apple Watch, allowing for seamless tracking and training on your preferred devices.

### How does the Fartlek mode work?

In Fartlek mode, the app automatically detects your speed and converts your run into structured intervals without requiring manual input. It provides live color-coded feedback on your effort levels.

### What are the subscription options for Fartlek Interval Trainer?

Fartlek Interval Trainer offers an optional auto-renewable subscription with monthly ($0.99) and annual ($6.99) plans. The annual plan includes a 7-day free trial.

### Can I sync my runs with other platforms?

Yes, Fartlek Interval Trainer offers full syncing with Strava and Apple Health, allowing you to share your runs and integrate your data with other fitness platforms.

### How do I cancel my subscription?

You can manage or cancel your subscription at any time through your Apple ID account settings. Auto-renewal must be turned off at least 24 hours before the end of the current period.

### What age rating does Fartlek Interval Trainer have?

Fartlek Interval Trainer has an age rating of 4+, making it suitable for a wide range of users interested in fitness tracking and training.

## Version history (last 5 releases)

### 3.0 — 2026-08-31

Insights are here!

Your completed interval workouts now explain what happened and what to take into your next run.

Included free for everyone:

• Get a clear, practical coaching insight based on your pace, effort, recovery and running form
• See how each session unfolded across work, recovery, warm-up and cooldown intervals
• Explore current-session running-form metrics including ground contact time, vertical oscillation, stride length and power

FiT Pro adds deeper historical analysis:

• Compare matching workouts interval by interval
• Track pace, heart rate and cadence side by side
• Choose which previous workout you want to compare
• Follow running-form trends over time

We’ve also refined the workout experience and made further performance and reliability improvements.

### 2.9 — 2026-08-22

Strava upload issues resolved. Strava has approved new limits on the number of users who can upload their workouts directly from the app. You can now upload your workouts directly to Strava – just connect to your Strava account, select the workouts you want to upload, and your workouts, route data and interval data will automatically be created in Strava.

Workouts can now also be exported as TCX files, which support workout and route data. You can use this to import your workouts into many other fitness apps and tools.

### 2.8 — 2026-08-01

Version 2.8 introduces a completely redesigned Workout Composer, making it faster, clearer and more enjoyable to build interval workouts.

• Visualize your complete workout with a live, color-coded workout ring.
• Create multiple sets and adjust their repetitions.
• Add, remove and reorder intervals with immediate visual feedback.
• Set interval durations using new minute and second controls.
• Choose Advanced pace bands with clear colors and your configured pace ranges.
• Enable or disable warm-up and cooldown while preserving their durations.
• Enjoy improved accessibility, support for light and dark mode, and numerous interface refinements.

Build your workout, understand its structure at a glance, and make every interval count.

### 2.7.1 — 2026-07-27

Minor fixes and performance improvements.

### 2.7 — 2026-07-06

Minor fixes and performance improvements.

## Apps similar to Fartlek Interval Trainer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Fartlek: AI Running Intervals](https://appshunter.io/ios/app/fartlek-ai-running-intervals/id6752724674) | — | Free | Health & Fitness |
| [Tempo: Run Log & Insights](https://appshunter.io/ios/app/tempo-run-log-and-insights/id1106746589) | 4.7 (1,032) | Free | Health & Fitness |
| [Custom Running Intervals](https://appshunter.io/ios/app/custom-running-intervals/id1533333253) | 2.0 (1) | Free | Health & Fitness |
| [Fit Run: Corra Fartlek com IA](https://appshunter.io/ios/app/fit-run-corra-fartlek-com-ia/id6743770507) | — | Free | Health & Fitness |
| [RUN interval - Running Timer](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752) | 4.7 (1,003) | Free | Health & Fitness |
| [Runs and Fartleks - IntervalUp](https://appshunter.io/ios/app/runs-and-fartleks-intervalup/id6467430781) | 1.0 (1) | Free | Health & Fitness |

## More apps by Richard English

- [Heatmapper : Movement Tracker](https://appshunter.io/ios/app/heatmapper-movement-tracker/id1551397226)

All apps by Richard English: https://appshunter.io/developer/1537547687

## Related topics

[fartlek interval trainer](https://appshunter.io/ios/topics/fartlek-interval-trainer) · [fartlek](https://appshunter.io/ios/topics/fartlek) · [intervals pro trainer](https://appshunter.io/ios/topics/intervals-pro-trainer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*