# Interval Clock

> Customizable interval training countdown timer with audio alerts for exercise. (iPhone/iPad app by Adam Dachis.)

- Source: https://appshunter.io/ios/app/interval-clock/id961918081 (this page in markdown: same URL + `.md`)
- Developer: [Adam Dachis](https://appshunter.io/developer/623445098)
- Category: Health & Fitness
- Price: Free
- Rating: 3.25/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 5.1.1 · 17 MB
- Released: 2015-02-04
- Data updated: 2026-09-17
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/interval-clock/id961918081/reviews.md

## What is Interval Clock?

Interval Clock guides you through interval training with a countdown timer that alerts you when you have to go faster or slower. This is ideal for use on a stationary bike, treadmill, or other piece of exercise equipment that allows you to look at your phone (although you can use the app for just its audio alerts without machinery if you prefer).

The app was originally designed for a 20 minute workout with short intervals, as this was found to be an ideal way to train (see this Lifehacker post for details: http://lifehacker.com/5989669). Now the app supports interval lengths and timers of your choosing. It will also remember the last interval you chose so you don't have to change it.

If you have any issues or want to report bugs, please let me know and I'll do my best to fix them.

## Key features

- Customizable interval lengths
- Countdown timer with alerts
- Supports audio-only workouts
- Remembers last interval settings
- Ideal for stationary bikes and treadmills

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/interval-clock/id961918081/reviews.md

### 2/5 — Broken

*2015-03-27*

The stop and start functions do not work. Sometimes they do. Sometimes they don't. I can't see a pattern. Press stop. Press start and it sticks on the current interval phase. The timer runs down but it doesn't switch to the other phase when the current phase is done.

### 3/5 — C25K integration lacking

*2015-03-01*

This app will be even better if there is integration with C25K training. I am currently using some customised mp3 so if i could import them into the app it would be nice too.

### 5/5 — Great app

*2015-02-24*

Perfectly simplistic

### 3/5 — Almost there

*2015-02-24*

I really like the simplicity of this app - and the cute little dog. A few suggestions for making this 5 stars:

1. It may just be my fat thumbs, but I found the buttons for changing the interval lengths very difficult to hit on my iPhone 5s. Could those buttons be made larger?

2. I'd love to use this for workouts consisting of longer intervals (e.g. 5 min high intensity, 2 min low intensity), but that seemed pretty cumbersome with intervals only measured in seconds. 

3. A lot of my interval workouts include a warm up period and cool down period. It would be great if there was a way to incorporate these into the timer.

## Frequently asked questions about Interval Clock

### What is Interval Clock used for?

Interval Clock is designed to guide users through interval training sessions with a countdown timer. It provides audio alerts to indicate when to change intensity, making it useful for exercises like running, cycling, or other cardio activities.

### Can I customize the intervals in Interval Clock?

Yes, Interval Clock allows you to set your own interval lengths and timer durations. The app also remembers your last chosen interval settings for convenience.

### Does Interval Clock work without exercise equipment?

Yes, while ideal for use with equipment like stationary bikes or treadmills, Interval Clock can be used for audio-only alerts without any machinery.

### What is the rating for Interval Clock?

Interval Clock has a rating of 3.3 stars based on 4 user ratings.

### What devices is Interval Clock available on?

Interval Clock is available on devices with an age rating of 4+.

### When was Interval Clock last updated?

The latest version of Interval Clock was released on February 4, 2015.

### Is Interval Clock free to use?

Yes, Interval Clock is available for free.

### Does Interval Clock have ads?

The provided data does not specify if Interval Clock contains advertisements.

## Version history (last 1 release)

### 1.2 — 2015-02-04

This update from Apple will improve the functionality of this app. No new features are included.

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## More apps by Adam Dachis

- [Commentron](https://appshunter.io/ios/app/commentron/id623445095)

All apps by Adam Dachis: https://appshunter.io/developer/623445098

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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 2026-09-17.*