# RefReady vs WhistleOS

The clearest difference is in-app purchases: RefReady at none against WhistleOS's 2. RefReady also leads on update cadence (weekly vs fortnightly) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. WhistleOS sells 2 in-app purchases, starting at $3.99 per month. RefReady asks for nothing beyond the download.

RefReady ships an update weekly, WhistleOS fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RefReady | WhistleOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 42 MB | 32 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Drew Russell](https://appshunter.io/developer/1896040942) | [Lorand Barabas](https://appshunter.io/developer/6814266536) |

## What reviewers say

### RefReady

[App page](https://appshunter.io/ios/app/refready/id6765746933)

**Features:** macOS Compatibility

**In-app purchases:** none


### WhistleOS

[App page](https://appshunter.io/ios/app/whistleos-referee-app/id6814266534)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WhistleOS Pro monthly | $3.99 | per month |
| WhistleOS Pro yearly | $44.99 | per year |


## Frequently asked questions

### Is RefReady free?

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

### Is WhistleOS free?

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

### Do RefReady or WhistleOS have ads?

Neither RefReady nor WhistleOS shows ads.

### Which is updated more often, RefReady or WhistleOS?

RefReady ships an update weekly, and WhistleOS fortnightly. Most recently, RefReady was updated on October 25, 2026 and WhistleOS on October 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.*