
WhistleOS: Referee App
The referee app for your wrist
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Free
In-App Purchases
Rating summary
About
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
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
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What's New in WhistleOS
1.3.3
October 31, 2026
New in 1.3.3: • Pro through your account: if you unlocked Pro with your Apple or Google account – for example through your soccer association – it now also applies on your iPhone after signing in (Settings → Account). • “Delete account” now also removes the data stored for your account on our server. • Small improvements.
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Subscriptions & In-App Purchases
WhistleOS Pro monthly
All Pro features, billed monthly
$3.991 Month









