Fartlek is Swedish for “speed play”: one continuous run that mixes faster surges with easier running, instead of stopping between reps. It builds speed and endurance at the same time, and it's one of the most fun ways to train.
Fartlek, the app, turns that idea into structured runs: every surge and every recovery has an effort target and a cue, so you always know when to push. Alongside fartlek you get intervals, tempo runs, hills and long runs.
Tell Pete what you feel like running, or send a photo of a workout you saw, and he builds it in seconds: warm-up, reps, recoveries and cool-down, sized to the time you have. Or he finds a matching run in the library.
Choose 5K, 10K, general fitness or your own goal, like a first half marathon, and the days you can run. Pete plans each week around your race date and how last week went, and you can chat with him to move or change a run.
Every rep has an effort target, from 30% (very easy) to 100% (all out). Voice, color and haptic cues tell you when to speed up and when to recover, even with your phone locked in your pocket. Intervals by time or by distance.
Send your plan runs to Apple Watch and run them in Apple's Workout app, or with Fartlek on the Watch. They come back to your plan as done.
See every rep with pace, heart rate and calories, synced with Apple Health. Pete picks one thing from the data to work on next time and tells you what your next run is for.
Structure without the clutter.
25 workouts: intervals, fartlek, tempo, hills and long runs, plus classics like Yasso 800s, Billat 30/30, Mona Fartlek and the Norwegian 4x4.
What 60% or 80% should feel like, from the talk test to all out. No pace or heart-rate zones needed.
A cue at the start, middle and end of every rep, with the screen off.
Runs, heart rate and calories saved to Apple Health automatically.
Accurate distance, smoothed so standing still during rests doesn't count.
English, Spanish, French, Italian, German, Portuguese and Hindi.
Download Fartlek free and run a free workout every week.
Every run in the library, the runs Pete builds for you, and training plans that adapt. US$4.99 a month or US$29.99 a year in the US, with a 3-day free trial on the yearly plan. Prices vary by country.
Yes. Fartlek is an iPhone and Apple Watch app built around fartlek and interval running. It has ready-made fartlek workouts, and its AI coach can build one to your liking, like “30 minutes of fartlek with short surges”, with an effort target and a cue for every surge.
Fartlek lets you run intervals by time or by distance, with voice, color and haptic cues that work with the screen locked, and it runs on Apple Watch. Unlike a plain interval timer, it also has an AI coach that builds workouts for you and training plans for 5K, 10K and more.
Yes. In Fartlek, an AI coach named Pete builds runs from a description or a photo of a workout, writes and adapts your training plan every week, answers questions about your plan, and gives you one concrete tip after each run.
Yes. Choose your race and date in Fartlek and you get a week-by-week plan. Each run can go to your Apple Watch and be run in Apple's Workout app, and it's marked as done in your plan.
Yes. Describe the run you want, or send a photo or screenshot of a workout from a coach, a book or social media, and Pete turns it into a run you can start right away.
Fartlek uses an effort scale from 30% to 100%, a version of RPE (rate of perceived exertion). 30% is very easy, 60% is steady, 70% is moderately hard, 80% is hard and 100% is all out. The app includes a guide to how each level should feel, so you don't need pace or heart-rate zones.
Yes. If you can't yet run 20 minutes without stopping, your plan starts with run/walk intervals, and every run is guided by feel rather than pace.
Fartlek is free to download and includes a free run every week. Premium costs US$4.99 a month or US$29.99 a year in the US, with a 3-day free trial on the yearly plan. Prices vary by country.
Yes. Your runs, with heart rate and calories when you wear an Apple Watch, are saved to Apple Health automatically.
English, Spanish, French, Italian, German, Portuguese and Hindi, including the AI coach.
