# Interval Run: Treadmill Coach — Interval running & HIIT timer

> Interval running & HIIT timer (iPhone/iPad app by Yoo jaesung.)

- Source: https://appshunter.io/ios/app/interval-run-treadmill-coach/id6812627914 (this page in markdown: same URL + `.md`)
- Developer: [Yoo jaesung](https://appshunter.io/developer/1550716656)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 55 MB
- Languages: American English
- Released: 2026-09-19
- Data updated: 2026-10-16

## What is Interval Run?

Exercise healthily, backed by science.

Doing intervals on your own usually means watching the clock more than the run. Every minute you have to speed up, change the incline and remember what comes next. Interval Run does that part for you, by voice. Put your earbuds in and just follow what you hear.

[Treadmill mode]
It tells you ahead of time when to change, to what speed and to what incline. It even allows for the few seconds your belt needs to catch up, so each change is called early and you hit the new pace right as the phase starts.

[Outdoor mode]
Outside, GPS tracks your distance and pace. Drift below your target and the coach says "a little faster", so there is no need to pull out your phone. Every run is saved with its route on a map.

[14 proven interval programs]
Both modes use the same programs, from walking to sprints. Pick the one that fits where you are today.
- Beginner: Run-Walk, Power Walk, Slow Jogging, Easy Run
- Intermediate: Lose Weight, Endurance, Tempo, Pyramid, Fartlek, Hill Repeats, Legs Strengthening
- Advanced: 4 × 4 Intervals, Hill Sprints, Agility Booster

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.00 | one-time |


## Is Interval Run safe?

Not enough ratings yet to assess Interval Run.

## Is Interval Run legit?

Interval Run: Treadmill Coach has limited verification signals. The AppsHunter Legitimacy Score for Interval Run is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.4 — 2026-10-12

Now in 8 more languages: Spanish, German, French, Italian, Portuguese, Indonesian, Simplified and Traditional Chinese. Screen and voice coach both follow your device language. Android: the app now asks for notification permission so the outdoor-run notification shows.

### 1.0.3 — 2026-09-28

New program "Slow Jogging": repeated 8-minute stretches of easy running at walking speed. Five beeps now count down the last seconds before each phase change, and a spoken summary (distance, average speed, calories) closes every workout. Walking phases run at a more natural speed. Outdoor distance is also more accurate: GPS jitter no longer adds to your total.

### 1.0.2 — 2026-09-22

Fixed long program names overlapping the level tag on the home screen.

### 1.0.1 — 2026-09-21

Fixed the markers and location dot on the in-run map. Outdoor phase briefings now include your current pace.

### 1.0 — 2026-09-19

No release notes.

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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 2026-10-16.*