TeamWhistle vs WhistleOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TeamWhistle
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TeamWhistle is an watchOS app for hockey umpires that allows you to easily keep track of all match data such as time, cards and goals. It also has a huge amount of extra functionality for all your different umpiring needs such as: - Workout metrics - Heatmaps and pitch routes - Weather information - Synchronisation of data between users - Shootout goal tracking - Digital toss coin For more info, guides and contact visit https://developmenthawkeye.github.io/teamwhistle-website
WhistleOS
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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
Screenshots
Verdict
The clearest difference is in-app purchases: TeamWhistle at none against WhistleOS's 2. TeamWhistle also leads on iOS requirement (13.0 vs 17.0). WhistleOS's advantage is update cadence (every 11 days vs every 6 weeks). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. WhistleOS sells 2 in-app purchases, starting at $3.99 per month. TeamWhistle asks for nothing beyond the download.
TeamWhistle ships an update every 6 weeks, WhistleOS every 11 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | TeamWhistle | WhistleOS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 9 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Homerus Hoogland | Lorand Barabas |
In-app purchases
TeamWhistle
No in-app purchases
WhistleOS
- WhistleOS Pro monthly$3.991 Month
- WhistleOS Pro yearly$44.991 Year









