# Intervals One vs HIIT Timer Pro

The clearest difference is update cadence: HIIT Timer Pro at every 9 days against Intervals One's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Intervals One sells 3 in-app purchases, starting at $1.99 per month and HIIT Timer Pro sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Intervals One ships an update every 4 months, HIIT Timer Pro every 9 days. The most recent releases landed on October 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Intervals One | HIIT Timer Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hiit-timer-pro-intervals/id6747914671/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 64 MB | 20 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ninety Six Software Ltd](https://appshunter.io/developer/1728731100) | [Develak](https://appshunter.io/developer/1803580275) |

## What reviewers say

### Intervals One

[App page](https://appshunter.io/ios/app/intervals-one-interval-timer/id6741439106)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Annual | $14.99 | per year |
| Pro Lifetime | $19.99 | one-time |


### HIIT Timer Pro

[App page](https://appshunter.io/ios/app/hiit-timer-pro-intervals/id6747914671)

This app provides a precision timer for high-intensity interval training, offering customizable workout parameters and clear visual cues. It supports background playback, haptic feedback, and auto-saves workout history with detailed statistics.

**Highlights:** Customizable work, rest, and round intervals, Giant countdown screen and progress ring, Studio-grade sound packs with adjustable volume, Background playback and optional haptic feedback, One-tap controls for pause, skip, stop, and mute, Auto-save workout history and performance stats, Offline-first design for training anywhere

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SimplyTask Pro - Monthly | $2.99 | per month |
| Hiit Timer Pro - Yearly | $19.99 | per year |


## Frequently asked questions

### Is Intervals One free?

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

### Is HIIT Timer Pro free?

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

### Do Intervals One or HIIT Timer Pro have ads?

Neither Intervals One nor HIIT Timer Pro shows ads.

### Which is updated more often, Intervals One or HIIT Timer Pro?

Intervals One ships an update every 4 months, and HIIT Timer Pro every 9 days. Most recently, Intervals One was updated on October 9, 2026 and HIIT Timer Pro on September 26, 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.*