# Whistle Timer vs HIIT Timer / Interval Timer

The clearest difference is rating: HIIT Timer / Interval Timer at 4.9 against Whistle Timer's 4.4. HIIT Timer / Interval Timer also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 10 months). Whistle Timer's advantage is ads (none vs shown) and ratings volume (99 vs 14). On price and device support there is nothing between them.

Both are free to download. Whistle Timer sells 1 one-off in-app purchase. HIIT Timer / Interval Timer asks for nothing beyond the download.

HIIT Timer / Interval Timer holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Whistle Timer has 99 ratings behind it against 14, so its average is the more settled of the two.

Whistle Timer ships an update every 10 months, HIIT Timer / Interval Timer every 2 months. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Whistle Timer | HIIT Timer / Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (99 ratings)](https://appshunter.io/ios/app/whistle-timer/id1279336519/reviews) | **[4.9 (14 ratings)](https://appshunter.io/ios/app/hiit-timer-interval-timer/id1610842683/reviews)** |
| Number of ratings | **99** | 14 |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 4 MB | 12 MB |
| Requires iOS | **15** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Applorium Ltd](https://appshunter.io/developer/1688522804) | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) |

## What reviewers say

### Whistle Timer

[App page](https://appshunter.io/ios/app/whistle-timer/id1279336519)

Create custom workout schedules with customizable work and break intervals. Save your training plans for future use and focus on your fitness goals. The app can run in the background to keep your workout on track.

**Highlights:** Customizable workout schedules, Add custom breaks, Save training plans, Background operation, Whistle sound option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all settings | $2.99 | one-time |


### HIIT Timer / Interval Timer

[App page](https://appshunter.io/ios/app/hiit-timer-interval-timer/id1610842683)

This app provides a customizable timer for high-intensity interval training. Easily set up warm-up, workout, and cool-down periods with adjustable intervals and counts. Personalize colors, sounds, and notifications for a tailored experience.

**Highlights:** Unlimited timer creation, Customizable intervals (warm-up, workout, cool-down), Adjustable counts, Color and sound customization, Dark mode support, Background notifications

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Whistle Timer free?

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

### Is HIIT Timer / Interval Timer free?

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

### Which has better reviews, Whistle Timer or HIIT Timer / Interval Timer?

HIIT Timer / Interval Timer is rated higher. Whistle Timer averages 4.4 out of 5 from 99 ratings, while HIIT Timer / Interval Timer averages 4.9 from 14 ratings.

### Do Whistle Timer or HIIT Timer / Interval Timer have ads?

HIIT Timer / Interval Timer shows ads; Whistle Timer does not.

### Which is updated more often, Whistle Timer or HIIT Timer / Interval Timer?

Whistle Timer ships an update every 10 months, and HIIT Timer / Interval Timer every 2 months. Most recently, Whistle Timer was updated on September 15, 2026 and HIIT Timer / Interval Timer on September 17, 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.*