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Core: Interval & HIIT Timer

Core: Interval & HIIT Timer

Tabata, Boxing, Workout Rounds

4 ratings
6 reviews
💪 Health & Fitness
⚽ Sports
Free
In-App Purchases

Details

Released
April 28, 2021
Updated
October 28, 2026

Features

Developer

Yating Lu
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Core: Interval & HIIT Timer screenshot #1 for iPhone
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Core: Interval & HIIT Timer screenshot #4 for iPhone
Core: Interval & HIIT Timer screenshot #5 for iPhone
🧾$14.99
In-App Purchase↘︎
⭐6
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🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦~ in 2 years
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About

This app helps you stay focused during workouts by managing intervals, work times, and rest periods with clear visual and audio cues. Save custom routines for HIIT, Tabata, or boxing, and track your training history to monitor progress.

✓Customizable interval timers
✓Audio cues for work/rest phases
✓Save and reuse workout routines
✓Visual countdown and color coding
✓Workout history and trend tracking
✓Optional Pro features via in-app purchase
Show original description
+1

What's New in Core

1.1

October 28, 2026

A clearer view of every workout • Revisit completed sessions and weekly training trends • Keep your usual work, rest and set settings in saved workouts • Explore monthly and yearly trends and export CSV with Core Pro • Refined countdown screens and audio cues

More
3

Subscriptions & In-App Purchases

Monthly

Subscription for Core Premium, renews monthly

$1.991 Month
How to cancel Core subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Core timer

Good apps to keep track of training workout
LFLow first

Good app

Awesome app without any mistakes
Llordtofe

Thank You

What an absolutely beautiful app! Thank you for developing it so great.
IWInvisible Waters

Workout, Pomadoro, Baking Multiple uses!

Using the app is Ez and fun! Keeping track of time for working out is by design… using it as a pomadoro method timer works perfectly! (ADHDers try it!)
 3 cheers Developers! Thanks
BBikerBunnyD

Helpful app!

I used it for my interval trainings, and it’s very helpful to keep track of time in workout. I can easily customize the time and sets I want to workout and also a timer for a small water break. Awesome App!
SSimonChen1993

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FAQ

What is Core's primary function?

Core is designed to manage workout intervals, allowing users to set work times, rest times, and sets. It provides clear countdowns and audio cues to guide users through their training sessions.

Can I create custom workouts with Core?

Yes, you can build custom timers for various training styles like HIIT, Tabata, circuit training, or boxing rounds. These saved workouts can be readily accessed for future training sessions.

How does Core help me track my progress?

The app allows you to revisit completed sessions and view your weekly training trends. This history provides insights into your training efforts beyond the immediate workout.

What features are included in Core Pro?

Core Pro unlocks unlimited timers, duplicates, full workout history, monthly and yearly trends, and CSV export. These advanced features require an in-app purchase.

How much does Core Pro cost?

Subscription plans for Core Pro are available with monthly pricing at $1.99 and yearly pricing at $9.99. These prices are displayed before purchase within the app.

How do I cancel my Core Pro subscription?

You can manage or cancel your auto-renewable subscription at any time through your App Store account settings. Cancellation must be done at least 24 hours before the current subscription period ends.

What devices is Core compatible with?

Core is currently supported on iPhone and iPod devices. The app is rated for ages 4 and up.

How often is Core updated?

The latest version of Core is 1.1, last updated on October 28, 2026. This indicates a recent update, suggesting ongoing development and support.