# IntervalTimer vs HIIT Trainer

The clearest difference is in-app purchases: HIIT Trainer at none against IntervalTimer's 1. HIIT Trainer also leads on update cadence (every 2 days vs every 5 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. IntervalTimer sells 1 one-off in-app purchase. HIIT Trainer asks for nothing beyond the download.

IntervalTimer ships an update every 5 days, HIIT Trainer every 2 days. The most recent releases landed on September 28, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | IntervalTimer | HIIT Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 52 MB | 14 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [naoki otsu](https://appshunter.io/developer/1082476153) | [巧 唐](https://appshunter.io/developer/6790363579) |

## What reviewers say

### IntervalTimer

[App page](https://appshunter.io/ios/app/intervaltimer-workout-timer/id6761044639)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Edition | $4.99 | one-time |


### HIIT Trainer

[App page](https://appshunter.io/ios/app/hiit-trainer-interval-timer/id6790511820)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IntervalTimer free?

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

### Is HIIT Trainer free?

HIIT Trainer is free to download, with no in-app purchases.

### Do IntervalTimer or HIIT Trainer have ads?

Neither IntervalTimer nor HIIT Trainer shows ads.

### Which is updated more often, IntervalTimer or HIIT Trainer?

IntervalTimer ships an update every 5 days, and HIIT Trainer every 2 days. Most recently, IntervalTimer was updated on September 28, 2026 and HIIT Trainer on September 24, 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.*