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App Store Apps > Health & Fitness > RoundShift: Interval Timer
RoundShift: Interval Timer icon

RoundShift: Interval Timer

by Carl Law · Health & Fitness · Free
On the App Store since July 2026 · Data updated 2026-11-03

RoundShift: Interval Timer is made and published by Carl Law. AppBrain is an independent app data site and isn't affiliated with Carl Law. The app name, icon, screenshots and description belong to Carl Law and are shown as published on the App Store.

AppBrain's verdict

Rating on App Store
5.00
1 ratings
Last updated
July 31, 2026
Size
143.0 MB

It doesn't have enough ratings yet to judge what users think.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on RoundShift: Interval Timer for iOS

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Store listing

By Carl Law, from the App Store
RoundShift: Interval Timer Screenshot 1 of 5
RoundShift: Interval Timer Screenshot 2 of 5
RoundShift: Interval Timer Screenshot 3 of 5
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RoundShift: Interval Timer Screenshot 5 of 5
Screenshots by Carl Law, from the the App Store listing
Description by Carl Law Written by the developer, not by AppBrain. Click to read.
The interval timer you don't have to look at.

RoundShift calls out every round — get ready, work, rest, half way,
last round — so your eyes stay on the workout, not the screen.

BUILT IN SECONDS
• Tabata, HIIT, EMOM, strength presets — or design your own
• Warm-up, custom intervals, unlimited rounds
• Describe a workout in plain words and let RoundShift build it

VOICE THAT COACHES
• Real coach voices in 10 languages — or calm and hype styles
• 89 exercise names spoken aloud in custom workouts
• Works with the screen off, phone face down, music playing

COACH MODE ON THE BIG SCREEN
• AirPlay the countdown to any TV for group sessions and classes
• Giant display the whole room can read

APPLE WATCH + ADAPTIVE REST (PRO)
• Full timer on your wrist with live heart rate
• Rest that adapts: end rest early when your heart rate recovers,
or extend it when you need more
• Workouts logged to Apple Health with the right activity type

SEE YOURSELF SHOW UP
• Streaks, weekly minutes, and a calendar of every session
• Home Screen widgets and quick actions

NOT JUST FOR THE GYM
• Box breathing and breathwork: 4-4-4-4 in seconds
• Stretch and physio holds with spoken changeovers
• Focus sprints for study and deep work
• Anything that repeats: intervals are intervals

RoundShift is free forever for running timers and built-in workouts.
RoundShift Pro (one-time purchase, no subscription) unlocks saved
workouts, stats, widgets, and Apple Watch.
Official page on the App Store

Safety and technology

Found in the app by AppBrain
Price
Free
App size
143.0 MB
Content rating
Everyone

Technologies used by RoundShift: Interval Timer

Releases

Updates seen on the App Store
Version
1.3
Launched
July 2026

No changelog data

Alternatives

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Rankings

App Store top charts

App Store Rankings for RoundShift: Interval Timer

This app is not ranked

About the app and developer

About RoundShift: Interval Timer

RoundShift: Interval Timer is a health & fitness app developed by Carl Law.

User Ratings

RoundShift: Interval Timer is rated 5.00 out of 5 stars. The rating is based on one rating ratings.

App Information

RoundShift: Interval Timer is freely available from the App Store. The app size is 142.99 MB. The latest version available is 1.3. The last update was on July 31, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since July 2026.

Developer information for Carl Law

Carl Law

Address:

Share RoundShift: Interval Timer

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Overview Alternatives Reviews Rankings Technology
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