# WhistleOS: Referee App — The referee app for your wrist

> The referee app for your wrist (iPhone/iPad app by Lorand Barabas.)

- Source: https://appshunter.io/ios/app/whistleos-referee-app/id6814266534 (this page in markdown: same URL + `.md`)
- Developer: [Lorand Barabas](https://appshunter.io/developer/6814266536)
- Category: Sports, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 31 MB
- Languages: American English, French (France), German (Germany), Hungarian, Italian, Japanese, European Portuguese, Romanian, Russian, Chinese (Simplified, China) and 1 more
- Released: 2026-10-09
- Data updated: 2026-10-12
- User reviews in markdown: https://appshunter.io/ios/app/whistleos-referee-app/id6814266534/reviews.md

## What is WhistleOS?

WhistleOS is the app for football referees – from grassroots to elite. You run the match on Apple Watch and prepare and review it on iPhone.

ON YOUR WATCH
• Match clock with halves, stoppage-time suggestion and pause clock
• Goals (incl. penalties and own goals), yellow, second yellow and red with reason
• Cards for coaches and team officials, substitutions with bench and starting XI
• Heart rate, steps and running route during the match
• Three colour themes: light, pitch and contrast

ON YOUR IPHONE
• Import line-ups from a photo, screenshot or PDF (AI) and send them to the watch
• Import your assignments from e-mails or reports
• Match report with timeline, summary and PDF export
• Special reports for sending-offs
• Expense receipts with signature – the fee is taken from your association's fee list
• Season statistics with distance and heatmap
• Referee team mode: share squads and substitutions via QR code

FOR ASSESSORS
• Observation forms: German DFB, England (FA), Netherlands (KNVB), a generic international template – or import your association's form from a photo
• Notes with minute, thumbs up/down and pitch position
• AI suggestion for the ratings based on your notes – every rating stays editable

WHISTLEOS PRO
All features are free for 14 days. After that: WhistleOS Pro monthly or yearly. The subscription renews automatically and can be cancelled at any time in your Apple Account settings.

PRIVACY
Matches, heart rate and route stay on your device. Health data is not included in iCloud backups.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://sites.google.com/view/datenschutzwos

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| WhistleOS Pro monthly | $3.99 | per month |
| WhistleOS Pro yearly | $44.99 | per year |



## Version history (last 1 release)

### 1.3.0 — 2026-10-09

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-12.*