# Simple Interval Timer vs Whistle Timer

The clearest difference is review sentiment: Simple Interval Timer at 85% against Whistle Timer's 29%. Simple Interval Timer also leads on rating (4.9 vs 4.4) and ratings volume (5.4K vs 99). Whistle Timer's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Simple Interval Timer sells 4 one-off in-app purchases and Whistle Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Simple Interval Timer holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Simple Interval Timer has 5.4K ratings behind it against 99, so its average is the more settled of the two. Written reviews point the same way: 85% of Simple Interval Timer's written reviews are positive against 29% of Whistle Timer's.

Simple Interval Timer ships an update every 8 months, Whistle Timer every 10 months. The most recent releases landed on September 25, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Simple Interval Timer | Whistle Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (5.4K ratings)](https://appshunter.io/ios/app/simple-interval-timer/id458334253/reviews)** | [4.4 (99 ratings)](https://appshunter.io/ios/app/whistle-timer/id1279336519/reviews) |
| Number of ratings | **5.4K** | 99 |
| Positive reviews | **84.7% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 4 MB |
| Requires iOS | **14.5** | 15 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [0FF](https://appshunter.io/developer/455256988) | [Applorium Ltd](https://appshunter.io/developer/1688522804) |

## What reviewers say

### Simple Interval Timer

[App page](https://appshunter.io/ios/app/simple-interval-timer/id458334253)

This app provides a straightforward interval timer for various training types like running, cycling, and HIIT. Customize sets, action, and break durations for a personalized workout experience. It runs in the background and saves recent configurations.

**Highlights:** Customizable sets, action, and break durations, Plain and simple design, Saves last 5 configurations, Runs in the background, iOS screen dimming prevention, Apple Watch integration with heart rate monitoring

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Espresso | $0.99 | one-time |
| Americano | $1.99 | one-time |
| Ad-free version | $2.99 | one-time |
| Caramel Cappuccino | $2.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Efficient and straightforward
- 💰 Actually free, no paywall
- 🔊 Unobtrusive audio cues
- 🎶 Works well with music playback

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- ⚙️ Limited customization options
- 🔋 Compatibility issues with newer iOS versions
- 🔍 Difficulty deleting/managing saved configurations

**Reported bugs**

- Timer stops working when screen is locked
- Countdown beeps not syncing with timer
- Interval times not accurately tracked

**Requested features**

- Ability to name and delete saved configurations
- More granular interval time settings (e.g., 1-second increments)
- Stronger haptic feedback on Apple Watch
- Integration with workout tracking apps


### 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 |


## Frequently asked questions

### Is Simple Interval Timer free?

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

### Is Whistle Timer free?

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

### Which has better reviews, Simple Interval Timer or Whistle Timer?

Simple Interval Timer is rated higher. Simple Interval Timer averages 4.9 out of 5 from 5.4K ratings, while Whistle Timer averages 4.4 from 99 ratings.

### Do Simple Interval Timer or Whistle Timer have ads?

Simple Interval Timer shows ads; Whistle Timer does not.

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

Simple Interval Timer ships an update every 8 months, and Whistle Timer every 10 months. Most recently, Simple Interval Timer was updated on September 25, 2026 and Whistle Timer on September 15, 2026.

---

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