# Interval Timer -  Go Fit Now — For HIIT & Circuit Training

> Customizable interval timer with voice prompts for HIIT and circuit training. (iPhone/iPad app by 宇超 朱.)

- Source: https://appshunter.io/ios/app/interval-timer-go-fit-now/id1346472921 (this page in markdown: same URL + `.md`)
- Developer: [宇超 朱](https://appshunter.io/developer/837606978)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 3.80/5 from 28 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 30 MB
- Languages: American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2018-02-08
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/interval-timer-go-fit-now/id1346472921/reviews.md

## What is Interval Timer?

Congratulations! You have found the most professional and easy-to-use Interval Timer in App Store. 
This is different from those with complex operation or gaudy functions. It is easy to set up all kinds of circuit training plans. You can custom your exercise library, adjust theirs duration flexibly, and the dial interface is the settings page that allows you to complete most of the normal operations. WYSIWYG!

Next time you work out, maybe you’d like to try this practical voice coach fitness app! 

This app also has more powerful and practical functions. It includes warm-up, cold-down, recover and work out sessions, and also theirs duration can be changed flexibly. It can change the music automatically during your workout if you have subscribed the apple music service.
This app is suitable for personal trainers, fitness enthusiasts, bodybuilders, athletes, home exerciser and etc. Use with HIIT, Tabata, weight training, kettlebells, HIIT running, sprints, HIIT treadmill, and any interval fitness training. Help to establish a scientific, systematic, based on your characteristics and personalized training program and maximize your workout are all we can do. Depends on no equipment and exercise anywhere or anytime! Hope you enjoy it. 

AT A GLANCE:
 
+ Easy to customize you training plan
+ Smart voice prompts
+ Automatically play and change music
+ prompts the next workout name
+ Fully customizable times, cycles and repeats
+ Can run in the background
+ Clean and smart design
+ Great on iphone X
+ Support Siri ("Hey Siri, start a workout using Fit Now")
 + Support Apple Watch, Standalone Apple Watch workouts. Leave your iPhone at home!
+ Apple Health integration

 
MORE INFORMATION: 
 
• Easy Customize
  Touch what you want to change to set work time, rest time, cycles, repeats, warm up time and cooldown time. Stopwatchs can be set in 1 second increments up to 60 minutes!

• Customize your training plan  
  You can custom every single attribute like moves and its duration, and accordingly the voice system will prompts you what the next move is.
  
• Smart voice prompts system
  this app will alerts you when it is time to work, rest, warmup or cooldown, even when this app is running in the background.
  You can preset your workout names for per cycle, and this app will call out them while the timer begins working.
  You can turn off the voice prompts, and choose the vibration mode.

• Automatically play music
  this app allows you to set different playlists for each of the work duration, rest duration, warm up duration and cool down duration, and is easy to change the currently playing song in iPhone control center. 
  Or you can just choose any music app you like, this app supports multitasking.
 
• Runs in the background
  When the timer starts working, you can lock screen and run it in the background, and have it play voice prompts. Once your training plan ends, it won't run in the background any more, in case of more battery drain.

## Key features

- Customizable training plans
- Smart voice prompts
- Automatic music playback
- Background operation
- Apple Health integration
- Apple Watch support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| UNLIMITED HIIT TIMER | $3.99 | one-time |


## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/interval-timer-go-fit-now/id1346472921/reviews.md

### 1/5 — Upgrade this app a second time?

*2022-08-27*

I purchased the upgrade to this app at least three years ago. I believe I paid $10 for the upgrade. I just upgraded my iPhone and now they want me to pay for an upgrade again? I don’t think so. Make it right Fit Now!!!!

### 4/5 — Crashing every time I try to add low exercise

*2021-04-16*

Hello,

Love this app but it won’t stop crashing every time I try to add a low exercise to go with my high one. Please help.

### 2/5 — VERY GOOD

*2020-04-18*

But crashes a lot

### 2/5 — Bit dodgy

*2019-07-28*

Great to be able to set up different sessions and rest periods, but the app continually stops around the 2.45 and 1.35 points saying workout interrupted. Particularly annoying as I’m using the timer on a bike to do drills, and have to get my phone out to restart the workout. Please fix.

### 5/5 — Yay!

*2019-03-13*

So glad I finally found these. Been using my native stopwatch on the phone but it always timed out and locked mid-workout, so I couldn’t see the time. This is literally perfect.

### 4/5 — Sound

*2019-01-07*

Music needs to be louder. It gets quieter when I start

### 1/5 — Pauses itself

*2018-10-24*

I use to use this app for my 60/120 running.  

After this latest update it just randomly pauses.  I go to run for 60 seconds and then realize I’ve been running for what seems longer.  Pull up the app and it paused itself at 31 seconds.  

Then on the 120 it always seems to pause itself around the 45-47 second mark.  

I’ll be moving onto a new app.

### 4/5 — Easy to use

*2018-07-31*

Easy to use and cater to your own work outs. I’ve used the app to create HIIT dance related workouts, and running training. 
It’s great so far, just wish I could link the music to Spotify instead of Apple Music.

### 1/5 — sadly disappointed

*2018-07-16*

I enjoyed the free version so much that I upgraded to the next version of 3.99 and found that it kept glitching while I was attempting to make changes to my schedule. Waste of money to upgrade since the free version did not glitch. I deleted and and re-downloaded several times also turned my phone off nothing changed.

### 4/5 — This is Great! One thing tho

*2018-06-29*

I wish you had an option to not have the background music turned down. I feel like I don’t get the push I want from the music with it being so quiet. Which is a big deal for the cardio circuit I want to do with this app’s timer. Definitely a 5 star rating once this is implemented.

## Frequently asked questions about Interval Timer

### What is Interval Timer used for?

Interval Timer is designed to help users create and manage custom interval training plans for various fitness routines like HIIT and circuit training. It provides voice prompts to guide users through workouts and can integrate with Apple Music.

### Does Interval Timer have ads?

No, Interval Timer does not contain advertisements. The app is free to download and use without any ad interruptions.

### Can Interval Timer be used on Apple Watch?

Yes, Interval Timer fully supports Apple Watch, allowing for standalone workouts without needing your iPhone. You can start a workout directly from your watch.

### How does Interval Timer integrate with Apple Health?

Interval Timer offers integration with Apple Health, which allows your workout data to be synced and tracked within the Apple Health ecosystem. This helps consolidate your health and fitness information.

### What are the customization options in Interval Timer?

You can easily customize work times, rest times, cycles, repeats, warm-up, and cool-down durations. You can also set workout names for each cycle, which the voice system will announce.

### Can Interval Timer run in the background?

Yes, Interval Timer can run in the background, allowing you to lock your screen while your workout continues. It will stop running in the background once your training plan is complete to conserve battery.

### What is the user rating for Interval Timer?

Interval Timer has a rating of 3.8 stars based on 28 user ratings. This indicates a generally positive but mixed reception from its user base.

### When was Interval Timer last updated?

The latest version of Interval Timer is 1.3.1, which was last updated on March 20, 2018. The app was initially released on February 8, 2018.

## Version history (last 5 releases)

### 1.3.1 — 2018-03-20

This app has been updated by Apple to display the Apple Watch app icon.

1.  Standalone Apple Watch workouts. Leave your iPhone at home!
2. Apple Health integration

### 1.9.0 — 2018-03-08

1.Play the next song when switch back to either the work or rest duration

### 1.2.2 — 2018-02-28

1.  iPhone5s / iPhoneSE screen size Adaption
2. support 3dtouch

### 1.2.1 — 2018-02-16

1. support 3D Touch
2. fix bugs

### 1.2 — 2018-02-15

1. Integration of Siri to control your workouts with the voice ("Hey Siri, start a workout using Fit Now")

## Apps similar to Interval Timer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Seconds Interval Timer](https://appshunter.io/ios/app/seconds-interval-timer/id475816966) | 4.7 (22,738) | Free | Health & Fitness |
| [Interval Timer: Workout Timer](https://appshunter.io/ios/app/interval-timer-workout-timer/id1448144846) | 4.8 (683) | Free | Health & Fitness |
| [Intervals Pro: HIIT Timer](https://appshunter.io/ios/app/intervals-pro-hiit-timer/id957586938) | 4.8 (13,331) | Free | Health & Fitness |
| [Interval Timer • HIIT & Tabata](https://appshunter.io/ios/app/interval-timer-hiit-and-tabata/id6444280214) | 4.7 (56) | Free | Health & Fitness |
| [Treadmill Workout: Running](https://appshunter.io/ios/app/treadmill-workout-running/id1547107953) | 4.7 (274) | Free | Health & Fitness |
| [Next Up - Interval Timer](https://appshunter.io/ios/app/next-up-interval-timer/id1376927836) | 4.7 (2,796) | Free | Health & Fitness |

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All apps by 宇超 朱: https://appshunter.io/developer/837606978

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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 2026-06-01.*