# Interval Timer vs Core

The clearest difference is rating: Core at 5.0 against Interval Timer's 3.8. Core also leads on review sentiment (100% vs 67%). Interval Timer's advantage is update cadence (weekly vs every 33 months) and monetization model (free vs freemium). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Interval Timer sells 1 one-off in-app purchase and Core sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Core holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Interval Timer has 28 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 67% of Interval Timer's written reviews are positive against 100% of Core's.

Interval Timer ships an update weekly, Core every 33 months. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Interval Timer | Core |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (28 ratings)](https://appshunter.io/ios/app/interval-timer-go-fit-now/id1346472921/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/core-interval-and-hiit-timer/id1562215374/reviews)** |
| Number of ratings | **28** | 4 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 33 months |
| Monetization | **Free** | Freemium |
| Size | 30 MB | 9 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [宇超 朱](https://appshunter.io/developer/837606978) | [Yating Lu](https://appshunter.io/developer/1526204219) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-go-fit-now/id1346472921)

This professional and easy-to-use interval timer allows for customizable circuit training plans with voice prompts and background operation. It supports music integration and Apple Health, making it ideal for various fitness routines.

**Highlights:** Customizable training plans, Smart voice prompts, Automatic music playback, Background operation, Apple Health integration, Apple Watch support

**Features:** macOS Compatibility, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (1)**

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


### Core

[App page](https://appshunter.io/ios/app/core-interval-and-hiit-timer/id1562215374)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $9.99 | per year |
| Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Interval Timer free?

Interval Timer is free to download, with in-app purchases available.

### Is Core free?

Core is free to download, with in-app purchases available.

### Which has better reviews, Interval Timer or Core?

Core is rated higher. Interval Timer averages 3.8 out of 5 from 28 ratings, while Core averages 5.0 from 4 ratings.

### Do Interval Timer or Core have ads?

Neither Interval Timer nor Core shows ads.

### Which is updated more often, Interval Timer or Core?

Interval Timer ships an update weekly, and Core every 33 months. Most recently, Interval Timer was updated on November 9, 2026 and Core on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*