Distance Interval Download on theApp Store
Today3 × 400 m · 200 m rest

Train through the finish line.

Set a distance, run it, rest, repeat. Interval training for iPhone and Apple Watch, with a coach that calls “Run!” and “Rest!” over your music.

Download on theApp Store
iPhone Run screen showing 224 m of the run remaining, round 1 of 3, over a map of the route
Apple Watch showing 265 m run remaining, round 1 of 3, with a Hold to Stop button
How it works

Three lanes to a better finish

Most runners fade in the last 50 metres. Intervals at race distance teach you to hold your pace all the way through the line.

  1. Set your session

    Pick a run distance or a run time, a rest, and how many rounds. Train for 100 m, 200 m, 400 m or more.

    Run 400 mRest 200 m× 3 rounds
  2. Run on the cue

    Your coach calls “Run!” and “Rest!” as each segment starts. The screen counts down what is left, so you know exactly how far to the line.

  3. Read your splits

    Every session is saved with its distance, time, pace and speed, round by round, with your fastest round highlighted.


Features

Everything you need between the lines

Run Remaining 224 m in green Rest Remaining 155 m in orange
Live countdown

See exactly how far is left

A big, glanceable number counts down the distance or time left in each run and rest. Green means run. Orange means rest.

Run remaining224 m
Rest remaining155 m

Hold to Stop on both iPhone and Apple Watch, so a bumped screen never ends your workout early.

Workout Summary: Session Complete, 1.83 km in 7:11 at 15.3 km/h, with a route map A saved session's route map with numbered markers where each round started, plus round splits
Summary and route maps

Every round, on the map

When you finish, you get a summary with your totals, your rounds and a GPS map of the route. The line is coloured by run and rest, with a marker where each round began.

History screen with all-time totals and a list of sessions
Workout history

Watch yourself get faster

Every session is saved with its distance, time, pace, average speed and calories. All-time totals sit at the top, so you can compare today with last week.

Settings: Distance or Timed, kilometres or miles, rounds, run and rest distance, and the four coach voices
Settings

Your session, your coach

  • Distance or Timed intervals.
  • Pick Flo, Shelley, Eddy or Rocko to call your cues. Tap a voice to hear it.
  • Totals, speed and pace in kilometres or miles. Interval distances stay in metres, like on a track.
  • Quick wheel pickers for rounds, distances and times.
Apple Watch

Leave the phone in the locker

Run the whole session from your wrist. Settings, history and routes stay in sync between your iPhone and Apple Watch.

Ready screen: Good GPS, 3 × 400 m with 200 m rest, Outdoor
Ready to go
Run Remaining 265 m
Run
Rest Remaining 164 m
Rest
Session Complete, 1.82 km total
Summary
Route map on the watch
Route map
Round splits on the watch
Rounds
Choosing a coach voice on the watch
Coach voice
Also in the bag

Indoors or out

Indoor runs

Choose Indoor for a treadmill or indoor track. Distance comes from your steps, and you can correct it afterwards with the treadmill’s reading.

Keeps your music

Voice cues mix with whatever you are listening to instead of stopping it.

Four languages

English, French, Spanish and German, voice cues included.


FAQ

Questions at the start line

Do I need an Apple Watch?

No. The iPhone app runs a full session on its own. If you have an Apple Watch, you can run from your wrist instead, and your history syncs between the two.

What is the difference between Distance and Timed?

Distance sessions end each run and rest when you have covered the distance you set, like 400 m. Timed sessions switch on the clock instead, like 60 seconds on and 90 seconds off.

Can I listen to music while I train?

Yes. The “Run!” and “Rest!” cues play over your music and podcasts without stopping them.

Does it work on a treadmill?

Yes. Choose Indoor before you start. Distance is measured from your steps, and after the session you can enter the treadmill’s distance to correct it.

Can I see miles instead of kilometres?

Yes. Totals, speed and pace can show in kilometres or miles. Interval distances stay in metres, the way a track is marked.

Why does it ask for my location?

Outdoor sessions use GPS to measure how far you have run and to draw your route. Indoor sessions do not use your location.

Privacy

Your runs stay with you

Distance Interval Trainer has no accounts and no servers. Your sessions, routes and settings are kept on your iPhone and Apple Watch.

  • Location is used during outdoor sessions to measure distance and draw your route.
  • Motion & Fitness is used for indoor sessions to count your steps.
  • With your permission, workouts are saved to Apple Health.
Support

Tell us what to build next

The app grows from runners’ requests. Questions, bugs or an idea for your next session, send them our way.

Run through the line. Every time.

Download on theApp Store