# Core vs Interval Timer

The clearest difference is in-app purchases: Interval Timer at none against Core's 3. Interval Timer also leads on update cadence (every 3 months vs every 33 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Core sells 3 in-app purchases, starting at $1.99 per month. Interval Timer asks for nothing beyond the download.

Core ships an update every 33 months, Interval Timer every 3 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Core | Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/core-interval-and-hiit-timer/id1562215374/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 3 months** |
| Monetization | Freemium | — |
| Size | 9 MB | 70 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yating Lu](https://appshunter.io/developer/1526204219) | [CODEENSIS LTD](https://appshunter.io/developer/859208704) |

## What reviewers say

### 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 |


### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-tabata-rounds/id6767566948)

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

**In-app purchases:** none


## Frequently asked questions

### Is Core free?

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

### Is Interval Timer free?

Interval Timer is free to download, with no in-app purchases.

### Do Core or Interval Timer have ads?

Neither Core nor Interval Timer shows ads.

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

Core ships an update every 33 months, and Interval Timer every 3 months. Most recently, Core was updated on November 3, 2026 and Interval Timer on October 31, 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.*