Fartlek Interval Trainer3.3 - App Store

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. Spoken coaching, audio and haptic alerts help you respond without constantly checking your device-and spoken cues automatically match your chosen language.

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.

Compare workouts to understand how your performance changes over time. Personalized coaching insights use your workout data to highlight meaningful patterns and offer practical recommendations for future sessions.

ADVANCED EFFORT TRACKING

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

APPLE WATCH, IPHONE AND YOUR FITNESS APPS

Train in your chosen language on Apple Watch or iPhone. Create and edit interval workouts directly on your watch, with controls for inserting, reordering and deleting interval groups.

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
. Localized spoken coaching, plus audio and haptic alerts
. Create and edit interval workouts on Apple Watch
. Detailed pace, heart rate, cadence and distance metrics
. Performance tracking for every interval
. Workout comparisons and personalized insights
. 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

Version History An expanded collection of ready-to-run workouts, refreshed workout cards, and easier ways to find your next session on iPhone and Apple Watch. 3.3 3d ago Minor fixes and performance enhancements. 3.2.1 Sep 23 Swipe to view live metrics

During a workout, swipe up or down on the progress ring to switch the metric shown in its centre.

Minor enhancements and bug fixes. 3.2 Sep 16 NEW — now available in 49 languages!

FiT is now available in 49 languages across both iPhone and Apple Watch.

Create workouts, follow every interval and understand your insights and stats in your preferred language—including all spoken coaching, alerts and cues.

• FiT automatically matches spoken coaching to your chosen language.
• Choose your FiT language independently of your App Store region, and change it whenever you like.

Buon Fartlek,
viel Spaß beim Fartlek,
bom Fartlek,
즐거운 파틀렉 되세요,
Happy Fartlekking!!!! 3.1 Sep 8 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. 3.0 Aug 31 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. 2.9 Aug 22 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. 2.8 Aug 1 Minor fixes and performance improvements. 2.7.1 Jul 27 Minor fixes and performance improvements. 2.7 Jul 6 Discover more about every workout with the new Metrics chart.

See your pace, heart rate and cadence displayed alongside your intervals to better understand how your performance evolved during each session. Zoom in, pan across your workout and switch to full-screen mode for detailed analysis.

We've also polished workout summaries and included further bug fixes and reliability improvements. 2.6 Jun 21 Version 2.5 introduces workout analysis charts, with new visualizations showing your target and actual performance for each interval.

Improved workout summaries provide cleaner, more informative workout reviews with key metrics highlighted.

Additional bug fixes and improvements enhance performance and reliability. 2.5 Jun 9 Version 2.4 introduces advanced pace bands for interval workouts.

Structured interval sessions can now use pace bands such as easy, moderate, hard and sprint, giving you a clearer way to plan, follow and review your efforts.

Whether you are building a gentle progression run, a hard interval session or a mixed-effort workout, intervals can now reflect the way you actually train — not just simple work and rest blocks.

This update also includes workout list layout refinements, improved alerts, minor fixes and performance improvements. 2.4 Jun 2 Version 2.3 includes major upgrades to pace band tracking and alerts.

You can now use advanced pace bands in fartlek workouts, helping you track efforts such as easy, moderate, hard and sprint instead of just simple run/walk changes. Available in Pro mode only.

Workout alerts have also been improved, with spoken and haptic cues for pace bands, interval pace, cadence, heart rate, distance splits and time alerts.

Also includes other minor fixes and performance improvements. 2.3 May 13 Minor fixes and performance improvements. 2.2.2 Apr 22 Minor fixes and performance improvements. 2.2.1 Apr 19 NEW! Pace Alerts are here.

FiT can now alert you when you drift above or below your target pace, with sound, haptic and on-screen feedback to help you stay on track during workouts.

Available in FiT Pro now. 2.2 Apr 16 NEW! Share your workout with friends. Tap the Share icon on your completed workout screen to share your workout details via WhatsApp, iMessage, email and more. 2.1.4 Apr 6 Minor cosmetic enhancements and bug fixes. 2.1.3 Mar 25 Version 2.1.2

Minor cosmetic enhancements and bug fixes. 2.1.2 Mar 21 Version 2.1.1

Bug fixes and performance improvements.

Version 2.1

NEW! Strava Integration
Sync your runs seamlessly.

NEW! Advanced Effort Levels
Automatic effort detection.

NEW! Skip to Next Interval 2.1.1 Mar 20 NEW! Strava Integration
Share your runs more easily and keep your training connected with seamless syncing to Strava. Simply connect your Strava account in the Settings page. Automatic syncing available.

NEW! Advanced Effort Levels
FiT now automatically detects when you’re sprinting, cruising or recovering, giving you deeper insight into how hard you’re working during every run.

NEW! Skip to Next Interval
Need to move on quickly? You can now jump straight to the next interval during a workout. 2.1 Mar 19 Version 2.0.3
Fixed an issue where navigating back during a workout on iPhone caused loss of the tab bar.

Version 2.0.2
New! Added support for music and other audio during workouts.

Version 2.0.1
New! Ability to search and sort previous workouts added.

Version 2.0.0
Completely rebuilt for 2026.

• Brand-new Liquid Glass interface across iPhone and Apple Watch
• New Dual Ring Progress View showing interval and workout progress at a glance
• Live, colour-coded interval feedback while you run
• All-new workout history with full per-interval health metrics
• A redesigned interval engine for more accurate auto-detection and recording 2.0.3 Feb 16 Version 2.0.2
New! Added support for music and other audio during workouts.

Version 2.0.1
New! Ability to search and sort previous workouts added.

Version 2.0.0
Completely rebuilt for 2026.

• Brand-new Liquid Glass interface across iPhone and Apple Watch
• New Dual Ring Progress View showing interval and workout progress at a glance
• Live, colour-coded interval feedback while you run
• All-new workout history with full per-interval health metrics
• A redesigned interval engine for more accurate auto-detection and recording 2.0.2 Feb 13 Version 2.0.1 
Ability to search and sort previous workouts added.

Version 2.0.0 
Completely rebuilt for 2026.

• Brand-new Liquid Glass interface across iPhone and Apple Watch
• New Dual Ring Progress View showing interval and workout progress at a glance
• Live, colour-coded interval feedback while you run
• All-new workout history with full per-interval health metrics
• A redesigned interval engine for more accurate auto-detection and recording 2.0.1 Feb 10 Completely rebuilt for 2026.

• Brand-new Liquid Glass interface across iPhone and Apple Watch
• New Dual Ring Progress View showing interval and workout progress at a glance
• Live, colour-coded interval feedback while you run
• All-new workout history with full per-interval health metrics
• A redesigned interval engine for more accurate auto-detection and recording 2.0.0 Feb 3