WhistleOS: Referee App
The referee app for your wrist
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New in 1.3.6
MATCH DAY
• Find team: look up a match in the public match directory and add it as an assignment
• Assignments live on the match day screen, can be deleted and optionally added to your calendar
• "Scan line-up" and "Scan assignment" are now named after what they read
• Reminder 30 minutes after the final whistle: "Match report in DFBnet?" (can be switched off)
• Practice match with captains; practice match and example match can be hidden
• Weather alert: about 24 hours before kick-off the app notifies you if rain, snow, frost, heat or storms are expected (can be switched off; with Pro, 14-day trial)
WATCH
• Stoppage time per action: goal, yellow, red/second yellow, substitution (0 to 60 seconds)
• Choose the captain on Apple Watch, leave a match on the watch, kick off without a line-up
• Notice when the watch and phone apps do not match
• Heads-up for the watch: before a match the app shows a short checklist of what to switch off or on on the watch, for example the watch’s automatic workout detection
ANALYSIS
• Year in review as a shareable story
• Run data: speed zones, sprints, heat map, heart-rate zones, season trends; compare the heat map with another match or your season average
• Export and import the running route as GPX
• Disciplinary codes for card reports (England, Scotland, USA, Australia, New Zealand, Netherlands, Denmark)
KIT COLOURS
• Colours confirmed by referees are shown as "Confirmed by referees". If you confirm or change colours, the app reports them without your name (team and colours).
ACCOUNT
• Sign in with Apple or Google in one place only: Settings > Account
• "Delete account" now also deletes on the server and tells you if that fails
• Cloud backup (optional): Finished matches, assignments, observation sheets and expense receipts are end-to-end encrypted on your device and synced between your devices. Off by default; switch it on under Settings > Cloud backup (needs an account and Pro; included in the 14-day trial)
LANGUAGES
• New: Arabic, Persian, Turkish; now 14 languages, right-to-left where needed
MORE
• Observation sheet: match details and referees from team search, editable
• Expenses: federation as its own selection list (iPhone)
• Rules quiz with 500 questions (IFAB 2026/27)
• Video help button on every main screen (can be switched off), guided tour on first start
• Share menu: open PDFs and images from other apps as assignment or line-up
• Substitution slots: several substitutions by one team within 60 seconds count as one slot, slot counter (can be switched off), half-time substitutions show as 46'; warning before sending to the watch if a captain is missing
Free without Pro: new match, squad by hand, the watch itself and "Scan line-up" on match day. Pro (14-day trial): AI import via other routes, "Send to watch", archive, observer, rules quiz, current rules, expense receipt, heart rate, kit colour lookup, weather alert, cloud backup.
The developer, Lorand Barabas, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Lorand Barabas
- Size
- 45.6 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 13 more
- English, Arabic, French, German, Hungarian, Italian, Japanese, Persian, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- WhistleOS Pro yearly $44.99
- WhistleOS Pro monthly $3.99
- Copyright
- © 2026 Elbé Productions
