Interval Run: Treadmill Coach

Exercise healthily, backed by science. Voice-coached treadmill intervals, GPS pace coach outdoors.

Exercise healthily, backed by science. Interval training on a treadmill means changing speed and incline at the right moment, every minute. Interval Run tells you when and to what, by voice. It knows the belt takes a few seconds to catch up, so every change is announced early.

13 proven interval programs, tagged beginner / intermediate / advanced

• Beginner: Run-Walk, Power Walk (incline walking), Easy Run (recovery jogs)
• Intermediate: Lose Weight (60/60), Endurance (long intervals + hills), Tempo, Pyramid, Fartlek, Hill Repeats, Legs Strengthening
• Advanced: 4 × 4 Intervals (VO2max), Hill Sprints, Agility Booster (repeated sprints)

Runs outdoors too GPS measures distance and pace, and when you drift below the target pace the coach says "a little faster". Follow the program without looking at the screen, and keep the route on a map.

Your level is a fitness estimate Levels 1 to 10 map to maximal aerobic speed. Every walk, run and sprint pace is a fixed fraction of it, inclines lower the speed with the ACSM metabolic equations, and heart-rate targets come from your age. One question after each workout adjusts your recommended level.

Readable at arm's length The run screen is built for a phone lying flat on the console: the phase colour fills the screen and the seconds left are one big figure. An always-dark option is included.

• No internet, no account, history stays on your device
• Korean, English and Japanese voice guidance, vibration and sounds
• Remove ads with a single one-time purchase

This app suggests treadmill speeds and inclines; it does not control the machine. Consult a physician before starting a new exercise program.