# Interval Timer ++ — HIIT & circuit workout timer

> Customizable interval timer for HIIT and circuit workouts with workout history. (iPhone/iPad app by Sunny Studio.)

- Source: https://appshunter.io/ios/app/interval-timer-plus-plus/id1327053127 (this page in markdown: same URL + `.md`)
- Developer: [Sunny Studio](https://appshunter.io/developer/430274590)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 14,778 App Store ratings · 535 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 87 MB
- Languages: American English, German (Germany), Chinese (Simplified, China)
- Released: 2017-12-20
- Data updated: 2026-09-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/interval-timer-plus-plus/id1327053127/reviews.md

## What is Interval Timer ++?

Award-winning app for your daily workouts! Simple set up, intense workout:
*** One touch to set up Workout, Rest, and Repeat.
*** Supports both iPhone and Apple Watch
*** Colorful design, to give you some eye candy while working hard
*** Multiple timers for easy access and training
*** Premium timers where different fitness types are mixed
*** Background notification, so you can keep working out while browsing other apps, or even when screen is locked
*** Listen to your favorite music while working out
*** See your workout history in calendar view

Health App Integration
We integrate with the health app (HealthKit) to read and track your steps data and show them in a beautiful way.

Feature details:
- Workout duration: 2 seconds to 8 minutes
- Rest duration: 0 seconds to 8 minutes
- Repeat: 20 times (50 times if purchased Premium Subscription)
- Premium timers: mix fitness types, including Planks, Jumping Jack, Push Ups, Sit Ups, High Knees, Side Planks, Butt Kicks, Side Lunges, Lunges, etc.
- Multiple timers for quick access
- Name your timers
- Swipe-to-delete timers
- Drag-n-drop to reorder custom timers
- 10 seconds count down, so you can get into workout position
- Count down sound before next workout starts, for you to recover position
- Pause and resume workout at any time
- Reset at any time if workout was interrupted
- Calendar view: shows your work/rest/repeat sessions
- Listen to your favorite music in background, while working out the Interval Timer in foreground
- Background music will be tuned down when playing workout sounds
- Vibration / Haptic feedbacks between workout and rest
- Ability to mute all workout sound

Users say good works after usage:
"I love the simplicity and ease of use of this app. It is almost exactly what I am looking for."
"No frills or gimmicks, this app gives it to you straight, which is how interval timers should work IMO."
"An eye-candy for your tough workouts."
"Mind-blowing on how easy it is to use."
"Simple. Does EXACTLY what you need."

Also checkout our awesome demo video on Youtube:
https://www.youtube.com/watch?v=gO_z8mN1asU

Interval Timer Pro (In App Purchase):
- Create unlimited number of timers for easy access
- Use our premium timers
- Repeat workout for more than 20 times

• You can subscribe for Interval Timer Pro inside the app; subscriptions are billed monthly or annually at the rate selected depending on the subscription plan.
• Alternatively a one-time payment plan is available (this is not a subscription).
• Payment will be charged to your iTunes account at confirmation of purchase.
• Subscriptions will automatically renew unless auto-renew is cancelled at least 24 hours before the end of current period.
• Your account will be charged according to your plan for renewal within 24 hours prior to the end of the current period. 
• You can manage or turn off auto-renew in your Apple ID account settings at any time after purchase.
• To manage your subscriptions or turn off auto-renewal:
  - Go to Settings > iTunes & App Store
  - Tap your Apple ID at the top of the screen
  - Tap View Apple ID. You might need to sign in or use Touch ID.
  - Tap Subscriptions.
  - Tap the subscription you want to manage.
  - Use the options to manage your subscription.
• No cancellation of the current subscription is allowed during the active subscription period. Once purchased, refunds will not be provided for any unused portion of the term.
We take the security of our customers very seriously.
Read our Terms of Service at
https://sunnystudio.wordpress.com/2018/08/03/interval-timer-terms-of-us/
and our Privacy Policy at
https://sunnystudio.wordpress.com/2018/07/31/interval-timer-privacy-policy/

Attributions:
Lock by Maxim Kulikov from the Noun Project
Premium by Gregor Cresnar from the Noun Project

## Key features

- Customizable work/rest/repeat intervals
- Supports iPhone and Apple Watch
- Workout history in calendar view
- Health app integration (HealthKit)
- Background notifications
- Listen to music during workouts
- Premium timers for mixed fitness types

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Interval Timer Pro | $0.99 | per 2 months |
| Interval Timer Pro | $1.99 | per 7 days |
| Interval Timer Pro | $1.99 | per month |
| Interval Timer Pro for a Year | $5.99 | per year |
| Interval Timer Pro | $0.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Timer for Entire Life | $8.99 | one-time |
| Premium Timer for One Week | $2.99 | one-time |
| Premium Timer for One Year | $7.99 | one-time |


## What do users think of Interval Timer ++?

Overall sentiment: neutral

**Pros**

- 👍 Simple and intuitive interface
- 🚀 Straightforward interval timer functionality
- 💡 Customizable timers and workouts
- 🔒 No ads or in-app purchases required

**Cons**

- 🐛 Inconsistent sound and volume issues
- 🐛 Bugs with timer functionality and data sync
- 🔋 High battery consumption when running in background
- 🚫 Limited customization options for timers and workouts

**Commonly reported bugs**

- Timers not working correctly after app updates
- Custom timers not saving or syncing across devices
- Unexpected pausing or stopping of timers during use

**Most requested features**

- Ability to name and save custom workouts
- Option to adjust rest time for individual exercises
- Countdown beeps or voice cues during intervals
- Integration with Apple Watch and other fitness devices

## Recent user reviews (10 of 535)

All indexed reviews: https://appshunter.io/ios/app/interval-timer-plus-plus/id1327053127/reviews.md

### 5/5 — Great app

*2026-08-25, version 4.3.3*

Very customisable, great value for money. Been using it for years 👌👌

### 5/5 — Just the Best

*2026-08-11, version 4.3.3*

It’s the best interval timer ever. Just get it.

### 1/5 — Paid for lifetime still does not work, asks to subscribe again.

*2026-07-15, version 4.3.3*

Paid for lifetime still does not work, asks to subscribe again.

### 1/5 — What happened to the ffw and repeat buttons?

*2026-07-13, version 4.3.3*

Can’t fast forward anymore so the app is basically useless to me now.

### 5/5 — It’s all you need.

*2026-07-05, version 4.3.3*

Simple, perfect. It’s all you need.

### 5/5 — Very good, one or two flaws

*2026-06-23, version 4.3.3*

Most interval apps are incredibly clunky. The interface for this app is very smooth, once you take a couple minutes to learn it — the interface is pretty intuitive, but it won’t hold your hand if you’re having trouble figuring it out. More importantly, after updating this morning, the app isn’t reliably making sounds anymore! I hope they catch this and patch it.

### 5/5 — Pretty great

*2026-06-18, version 4.3.3*

I’ve had this app for quite some time only thing I wish they’d add is individual seconds not just hoping 5-10-15 and after some numbers it skips too much it’d be nice to just type the time needed and for it to go off of that

### 1/5 — Can’t use without paying?

*2026-05-08, version 4.3.3*

I spent 20 minutes configuring a timer. When I go to use, it will not let me continue without paying. I don’t mind paying for useful apps, but I wanted to try it out first. I didn’t see any info that indicated payment would be required before trying.

### 3/5 — Stop sending reminder notifications!

*2026-05-04, version 4.3.3*

It’s annoying; no one needs this utility app reminder to notify them. When I need it, I open and use it.

### 4/5 — Missing one feature I would love to see

*2026-03-30, version 4.3.3*

This is almost everything I needed!
The one thing I'd really like to see is just a button to be able to skip to the next exercise. There are times when my set gets interrupted and I would like to skip to the middle of the routine, but as it stands I either need to wait for the timer to reach that point, or create a  new timer JUST for this specific circumstance. Just a little annoying.

## Frequently asked questions about Interval Timer ++

### What is Interval Timer ++?

Interval Timer ++ is an award-winning application designed to help users manage their high-intensity interval training (HIIT) and circuit workouts. It allows for easy setup of work, rest, and repeat intervals, supports both iPhone and Apple Watch, and offers features like background notifications and music integration.

### What are the key features of this interval timer?

Key features include customizable workout durations (2 seconds to 8 minutes), rest durations (0 seconds to 8 minutes), and repeat cycles. It also offers multiple timers for quick access, workout history tracking in a calendar view, HealthKit integration for steps data, and the ability to play music in the background.

### How much does Interval Timer ++ cost?

The app is free to download and use with basic features. Users can unlock advanced features such as unlimited timers, premium timers for mixed fitness types, and more repeat cycles through an in-app purchase. This can be a one-time payment or a subscription billed monthly or annually.

### What devices is Interval Timer ++ compatible with?

This application is designed for both iPhone and Apple Watch. It supports background notifications, allowing you to continue your workout even when browsing other apps or when the screen is locked.

### What are some common use cases for Interval Timer ++?

This app is ideal for structuring various types of workouts, including HIIT, circuit training, Tabata, and any exercise routine that requires timed intervals. Users can also utilize it for activities like yoga or meditation that benefit from timed sessions and rest periods.

## Version history (last 5 releases)

### 4.3.3 — 2021-12-16

Simple & Powerful workout timer for HIIT and Tabata.
- Automatically sync the workouts data from Watch app with the Interval Timer app

### 4.3.2 — 2021-12-09

Simple & Powerful workout timer for HIIT and Tabata.
- Fixed a crash on calendar view.

### 4.3.1 — 2021-11-25

Simple & Powerful workout timer for HIIT and Tabata.
- Fixed a crash on app start.

### 4.3.0 — 2021-11-03

Simple & Powerful workout timer for HIIT and Tabata.
- Bug fixes for watch app

### 4.2.0 — 2021-10-07

Simple & Powerful workout timer for HIIT and Tabata.
- You can use Interval Timer++ on your Apple Watch now

## 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 (19,032) | Free | Health & Fitness |
| [Seconds Interval Timer](https://appshunter.io/ios/app/seconds-interval-timer/id475816966) | 4.7 (23,504) | Free | Health & Fitness |
| [Intervals Pro: HIIT Timer](https://appshunter.io/ios/app/intervals-pro-hiit-timer/id957586938) | 4.8 (13,511) | Free | Health & Fitness |
| [Interval Timer □ HIIT Timer](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113) | 4.8 (85,854) | Free | Health & Fitness |
| [Tabata Timer: Interval Timer.](https://appshunter.io/ios/app/tabata-timer-interval-timer/id1255964203) | 4.9 (9,173) | Free | Health & Fitness |
| [Timer Tabata for Workout, HIIT](https://appshunter.io/ios/app/timer-tabata-for-workout-hiit/id756930454) | 4.7 (513) | Free | Health & Fitness |

## More apps by Sunny Studio

- [Data Manager for Fitbit](https://appshunter.io/ios/app/data-manager-for-fitbit/id739645466)
- [Find My Fitbit ++](https://appshunter.io/ios/app/find-my-fitbit-plus-plus/id910416536)
- [Dashboard for Apple Health App](https://appshunter.io/ios/app/dashboard-for-apple-health-app/id963634595)
- [Animal Emoji](https://appshunter.io/ios/app/animal-emoji/id1153019160)
- [Heart Rate Monitor +++](https://appshunter.io/ios/app/heart-rate-monitor-plus-plus-plus/id1338249687)

All apps by Sunny Studio: https://appshunter.io/developer/430274590

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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 2026-09-04.*