# RoundClock: HIIT & Tabata

> RoundClock: HIIT & Tabata (iPhone/iPad app by ZHENGQIAO JIANG.)

- Source: https://appshunter.io/ios/app/roundclock-hiit-and-tabata/id6763663534 (this page in markdown: same URL + `.md`)
- Developer: [ZHENGQIAO JIANG](https://appshunter.io/developer/1892168889)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18 · 2 MB
- Languages: English, French, German, Japanese, Korean
- Released: 2026-05-07
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/roundclock-hiit-and-tabata/id6763663534/reviews.md

## What is RoundClock?

The fastest interval timer for HIIT, Tabata, Boxing, and CrossFit.
Runs in background — even with screen off. Voice cues, custom workouts,
Lock Screen Live Activity. 100% offline. Lifetime purchase available.

WHAT YOU CAN DO

• FOUR PRESETS, ONE TAP
Tabata (20s work / 10s rest × 8), Boxing (3min / 1min × 12), HIIT
(45s / 15s × 10), and a Custom Workout builder. Tap and start training
in three seconds — no setup, no account.

• RUNS IN BACKGROUND
Lock the screen, switch apps, take a call — your timer keeps ringing on
schedule. Works through Silent Mode, plays cues on AirPods and Bluetooth
speakers, and never stops mid-round.

• VOICE CUES
Hear "Work!", "Rest!", "Round 3", "Final round" through your headphones.
No need to look at the phone — keep your eyes on form, not the screen.

• BIG NUMBERS, BOLD COLORS
200pt countdown digits at the center of the screen. Red for work, green
for rest, yellow for get-ready. Phone on the floor next to the dumbbells?
You can still read it from a plank.

• CUSTOM WORKOUTS
Vertical-scroll wheel pickers for time and rounds — works fine with sweaty
hands. Save unlimited workouts, name each interval ("Push-ups", "Squats",
"Burpees"), build multi-stage routines.

• LIVE ACTIVITY + DYNAMIC ISLAND
Lock Screen shows the current interval, round number, and seconds
remaining. Dynamic Island keeps the timer visible while you switch apps
or check Spotify mid-workout.

• HISTORY & STATS
Every completed session is logged automatically. Weekly and monthly
charts show total time, rounds, and streaks.

PRIVACY FIRST
Everything happens on your iPhone. No accounts. No analytics. No ads.
No third-party SDKs. Your workout data never leaves your device.

3-day free trial, then $1.99/week. Monthly, yearly, or lifetime options
available. Lifetime is a one-time purchase, no renewal.

Terms of Use: https://taxlite.net/round_clock/terms.html
Privacy Policy: https://taxlite.net/round_clock/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |
| Weekly | $1.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $79.99 | one-time |



## Version history (last 1 release)

### 1.1.0 — 2026-05-12

Welcome to RoundClock!

• 4 presets ready in one tap — Tabata, Boxing, HIIT, Custom
• Runs in background, even with screen off
• Voice cues for Work, Rest, and round announcements
• Custom multi-stage workouts with named intervals
• Live Activity on Lock Screen and Dynamic Island
• 100% offline — no account, no data collection, no ads
• Now in German, French, Japanese, Korean and Simplified Chinese.
• Fixed dark-mode contrast on workout cards and round counts.
• Fixed paywall reappearing after a successful subscription.

Start with a 3-day free trial.

## More apps by ZHENGQIAO JIANG

- [Days Off — Holiday Planner](https://appshunter.io/ios/app/days-off-holiday-planner/id6763955034)
- [SimpleTranslate Pro](https://appshunter.io/ios/app/simpletranslate-pro/id6764520918)
- [Photo Cleaner: Smart Swipe](https://appshunter.io/ios/app/photo-cleaner-smart-swipe/id6764684027)
- [QR Barcode Scanner Reader](https://appshunter.io/ios/app/qr-barcode-scanner-reader/id6764745638)
- [MemePack: Chinese Stickers](https://appshunter.io/ios/app/memepack-chinese-stickers/id6764804165)

All apps by ZHENGQIAO JIANG: https://appshunter.io/developer/1892168889

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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 2026-08-18.*