# Futrak vs WhistleOS

The clearest difference is iOS requirement: Futrak at 15.6 against WhistleOS's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Futrak sells 3 one-off in-app purchases and WhistleOS sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Futrak ships an update every 10 days, WhistleOS every 11 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Futrak | WhistleOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 11 days |
| Size | 55 MB | 32 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Blak Labs Pte Ltd](https://appshunter.io/developer/6773242137) | [Lorand Barabas](https://appshunter.io/developer/6814266536) |

## What reviewers say

### Futrak

[App page](https://appshunter.io/ios/app/futrak/id6773242015)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Futrak Basic | $0.99 | one-time |
| Futrak Pro Upgrade | $1.99 | one-time |
| Futrak Pro | $2.99 | one-time |


### 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 Futrak free?

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

### Is WhistleOS free?

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

### Do Futrak or WhistleOS have ads?

Neither Futrak nor WhistleOS shows ads.

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

Futrak ships an update every 10 days, and WhistleOS every 11 days. Most recently, Futrak was updated on October 28, 2026 and WhistleOS on October 31, 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.*