# Whistle vs REF!

The clearest difference is in-app purchases: Whistle at none against REF!'s 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. REF! sells 2 in-app purchases, starting at $2.99 per month. Whistle asks for nothing beyond the download.

## The numbers

| Metric | Whistle | REF! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 7 MB | 19 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Suzanne Garrett](https://appshunter.io/developer/1808066473) | [Rodrigo Vicente Valmorisco](https://appshunter.io/developer/1896652752) |

## What reviewers say

### Whistle

[App page](https://appshunter.io/ios/app/whistle-sports-timer/id6754412929)

**Features:** macOS Compatibility

**In-app purchases:** none


### REF!

[App page](https://appshunter.io/ios/app/ref/id6769361893)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| REF! PRO Monthly | $2.99 | per month |
| REF! PRO Yearly | $14.99 | per year |


## Frequently asked questions

### Is Whistle free?

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

### Is REF! free?

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

### Do Whistle or REF! have ads?

Neither Whistle nor REF! shows ads.

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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.*