# Interval Timer - Core — Simple Workout Timer for HIIT

> Customizable interval timer for HIIT, Tabata, and other interval training workouts. (iPhone/iPad app by Yating Lu.)

- Source: https://appshunter.io/ios/app/interval-timer-core/id1562215374 (this page in markdown: same URL + `.md`)
- Developer: [Yating Lu](https://appshunter.io/developer/1526204219)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 91 MB
- Languages: English
- Released: 2021-04-28
- Data updated: 2026-06-05
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/interval-timer-core/id1562215374/reviews.md

## What is Interval Timer?

Core is a professional interval timer for your daily workouts!

- Workout with music: just use your favorite music apps while training.

- Count Reps: can be used as a counter to count your workout reps.

- Minimalist design: elegant interface and glanceable from afar.

- Customizable timers: simple to create your own timers and save presets.

- Audio Guide: beep sounds to use in noisy environments and voice guidance.

- Workout history: keep track of your workout with stats and calendar view.

- Suitable for all kinds of interval training: HIIT, Tabata, boxing, yoga, calisthenics, CrossFit, cardio exercises, circuit training and etc.

This app includes optional auto-renewable subscriptions: Monthly ($1.99), Yearly ($7.99). Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. Current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase.
Privacy policy: https://xydigital.studio/Privacy-Policy-4e08709f9d9144558415c7776536786d
Terms of use: https://xydigital.studio/Terms-of-Use-5d480081e6624643a7ac87cc87caf9f9

If you have any ideas to improve the App, please contact us via coretimerapp@gmail.com. Your feedback is highly valued!

## Key features

- Customizable timers and presets
- Audio guidance and beep sounds
- Rep counting functionality
- Workout history and calendar view
- Minimalist and glanceable design
- Music app integration

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $7.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/interval-timer-core/id1562215374/reviews.md

### 5/5 — Core timer

*2024-03-08, version 1.0.2*

Good apps to keep track of training workout

### 5/5 — Good app

*2023-01-17, version 1.0.2*

Awesome app without any mistakes

### 5/5 — Thank You

*2023-01-07*

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

### 5/5 — Workout, Pomadoro, Baking Multiple uses!

*2023-01-06*

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

### 5/5 — Helpful app!

*2022-12-16*

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!

### 5/5 — No sound on IOS 16.1.1

*2022-11-26, version 1.0.2*

I have been using Core Timer daily which is simple but effective. Unfortunately after upgrading my IOS to 16.1.1 today, no sound can be heard when previously set workout is played. The other apps on the phone can play sound as before. 
Possible to patch the app to overcome the issue?

## Frequently asked questions about Interval Timer

### What is Interval Timer - Core used for?

Interval Timer - Core is a professional interval timer designed for daily workouts. It supports various interval training types like HIIT, Tabata, boxing, yoga, and CrossFit, offering customizable timers and audio guidance.

### Can I use Interval Timer - Core with my music?

Yes, you can use your favorite music apps while training with Interval Timer - Core. The app is designed to allow seamless integration with other music applications.

### Does Interval Timer - Core have ads?

Interval Timer - Core does not contain advertisements. The app is free to download and use, with optional auto-renewable subscriptions for enhanced features.

### What are the subscription options for Interval Timer - Core?

Interval Timer - Core offers optional auto-renewable subscriptions: a Monthly plan for $1.99 and a Yearly plan for $7.99. Subscriptions automatically renew unless turned off at least 24 hours before the current period ends.

### How accurate is the rep counting in Interval Timer - Core?

Interval Timer - Core can be used as a counter to track your workout repetitions. While specific accuracy metrics are not provided, this feature is designed to assist users in monitoring their exercise count during workouts.

### What devices does Interval Timer - Core support?

Interval Timer - Core is supported on iPhone and iPod devices. It is rated for ages 4 and up, making it accessible for a wide range of users.

### How often is Interval Timer - Core updated?

Interval Timer - Core was last updated on May 16, 2021, with version 1.0.2. The app was initially released on April 28, 2021. Users can contact the developer with feedback for potential future improvements.

### What is the user sentiment for Interval Timer - Core?

Based on the available data, Interval Timer - Core has a perfect rating of 5.0 stars from 3 ratings. This indicates a very positive user sentiment towards the application.

## Version history (last 2 releases)

### 1.0.2 — 2021-05-16

- Add workout reminder feature
- Separate the creation of a new timer and new counter
- User Experience optimization

### 1.0 — 2021-04-28

No release notes.

## Apps similar to Interval Timer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Interval Timer - Tabata Timer](https://appshunter.io/ios/app/interval-timer-tabata-timer/id406473568) | 4.5 (18,111) | Free | Health & Fitness |
| [Timer Plus - Workouts Timer](https://appshunter.io/ios/app/timer-plus-workouts-timer/id1279716547) | 4.8 (90,928) | Free | Health & Fitness |
| [HIIT • Workouts & Timer](https://appshunter.io/ios/app/hiit-workouts-and-timer/id891535485) | 4.8 (30,955) | Free | Health & Fitness |
| [Tabata Timer: Interval Timer.](https://appshunter.io/ios/app/tabata-timer-interval-timer/id1255964203) | 4.9 (9,023) | Free | Health & Fitness |
| [Interval Timer □ HIIT Timer](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113) | 4.8 (82,735) | Free | Health & Fitness |
| [Interval Timer: Workout Timer](https://appshunter.io/ios/app/interval-timer-workout-timer/id1448144846) | 4.8 (683) | Free | Health & Fitness |

## More apps by Yating Lu

- [Pomodoro Timer - Foca](https://appshunter.io/ios/app/pomodoro-timer-foca/id1526204217)

All apps by Yating Lu: https://appshunter.io/developer/1526204219

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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 2026-06-05.*