# SumCha: Interval Running — Voice & haptic interval timer

> Voice & haptic interval timer (iPhone/iPad app by Iksang Hwang.)

- Source: https://appshunter.io/ios/app/sumcha-interval-running/id6819497314 (this page in markdown: same URL + `.md`)
- Developer: [Iksang Hwang](https://appshunter.io/developer/1712487986)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 7 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, European Spanish
- Released: 2026-10-08
- Data updated: 2026-10-11

## What is SumCha?

Two minutes fast, one minute walk. Run intervals without watching the screen.

· Voice, haptics, and a 3-2-1 countdown tell you when intervals change
· Build your own program: warm-up, run, walk, repeats, cool-down
· When a set ends the run keeps going as a free run, and you can switch between intervals and free run any time
· Start, pause, and end from the Lock Screen, Dynamic Island, widgets, and Control Center
· Auto-pause when you stop, resume when you run
· Distance, pace, and calories, weekly/monthly/yearly summaries, and your route on a map
· Sync your history across your devices through your own iCloud (the developer can't see it)

Free to use. Ads appear only on the History tab and after a run summary — never on the running screen. One purchase removes all ads.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-10-08

No release notes.

## More apps by Iksang Hwang

- [TamTam - Routine & Pomodoro](https://appshunter.io/ios/app/tamtam-routine-and-pomodoro/id6754417573)
- [MyViralScore: Boost your likes](https://appshunter.io/ios/app/myviralscore-boost-your-likes/id6755632950)
- [EasyQuit: No Struggle](https://appshunter.io/ios/app/easyquit-no-struggle/id6756221886)
- [FastTam - fasting & diet](https://appshunter.io/ios/app/fasttam-fasting-and-diet/id6765995574)

All apps by Iksang Hwang: https://appshunter.io/developer/1712487986

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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 2026-10-11.*