By a referee. For referees.

The match on your wrist.

WhistleOS is the referee app for smartwatch and phone. On the pitch, the watch runs the match. Before and after, the phone takes care of squads, assessment and expenses.

Download on the App Store Get it on Google Play See features

Available now for iPhone, Apple Watch, Android, Wear OS and Huawei Watch. Try it free for 14 days, no payment details needed.

2ND HALF 71:48 HOME 1 : 1 AWAY

RECORDED EVENTS · TAP THE WATCH

Two devices, clear roles.

ON THE PITCH

The watch

  • Stopwatch with a second clock for added time
  • Cards with a check when a caution becomes a second yellow
  • Goals as regular, penalty or own goal
  • Substitutions, captain changes and half-time
  • Heart rate and steps, sent to the phone automatically after the final whistle

BEFORE AND AFTER

The phone

  • Read in squads from a photo and send them to the watch
  • Observer form modelled on the German DFBnet form
  • Match report with all events from the watch
  • Expense receipt as a PDF, straight by email
  • Cup formats with extra time and penalty shoot-out

Time under control

Half-time with adjustable length and an overrun display. It never ends by itself, you decide.

Cards without guesswork

Just yellow and red. If a cautioned player gets another yellow, the watch asks to confirm and counts one player fewer.

Team colours

Events appear in the team colour, substitutes neatly after the starting eleven, captain always on the pitch.

Heart rate and steps

The watch records along and transfers everything after the final whistle. If something is missing, send it later at the push of a button.

Observer form

All categories, criteria and factors, notes by text or dictation, and positions on the pitch.

Expenses done

Match, name and amount arrive as a PDF receipt in your email. No paper, no calculator.

Rules quiz

Over 340 questions on the Laws of the Game to practise between matches (questions currently in German). How sure are you really?

Stats and debrief

Running path, sprints and heatmap after the match, plus your season at a glance.

AI IMPORT

Photo in. Squad done.

  1. 1Take a photo of the line-up from the team sheet or a screenshot.
  2. 2The AI recognises starting eleven, bench, captain and coach of both teams.
  3. 3Check, confirm, send to the watch. Ready for kick-off.

Also for expenses: store your association’s list once, and after the match the AI picks the right amount.

One price. All features.

Try it free for 14 days, then WhistleOS Pro.

Monthly

€4.99

per month, cancel any month

Yearly

€49.99

per year, about two months free

Billed via the App Store or Google Play. Prices in euros, your store may show the price in your local currency. Promo codes can be redeemed in the app.

Platforms and watches

These watches already work with WhistleOS today. As of 31 October 2026. New watches are announced first on Instagram: @whistleos.app.

iPhone and Apple Watch

iOS · App Store · 16 models

Apple Watch Series9 models
Series 4Series 5Series 6Series 7Series 8Series 9Series 10Series 11Series 12
Apple Watch SE3 models
SE (1st generation)SE (2nd generation)SE 3
Apple Watch Ultra4 models
UltraUltra 2Ultra 3Ultra 4

Requires watchOS 10 or later and an iPhone with iOS 17 or later. Newer watches need the iPhone that Apple specifies for them.

Available · Download on the App Store

Android and Wear OS

Phone app and watch · Google Play · 44 models

Samsung13 models
Galaxy Watch4Galaxy Watch4 ClassicGalaxy Watch5Galaxy Watch5 ProGalaxy Watch6Galaxy Watch6 ClassicGalaxy Watch7Galaxy Watch FEGalaxy Watch UltraGalaxy Watch8Galaxy Watch8 ClassicGalaxy Watch Ultra 2Galaxy Watch9
Google5 models
Pixel WatchPixel Watch 2Pixel Watch 3Pixel Watch 4Pixel Watch 5
OnePlus5 models
Watch 2Watch 2RWatch 3Watch 3 (43 mm)Watch 4
OPPO4 models
Watch XWatch X2Watch X2 MiniWatch X3
Xiaomi3 models
Watch 2Watch 2 ProWatch 5
Mobvoi8 models
TicWatch E3TicWatch Pro 3 GPSTicWatch Pro 3 Cellular/LTETicWatch Pro 3 UltraTicWatch Pro 3 Ultra GPSTicWatch Pro 5TicWatch Pro 5 EnduroTicWatch Atlas
Other brands6 models
Motorola moto watch ultraFossil Gen 6¹Montblanc Summit 3TAG Heuer Connected Calibre E4 (42 mm)TAG Heuer Connected Calibre E4 (45 mm)Hublot Big Bang e Gen 3

¹ after the update to Wear OS 3

Requires Wear OS 3 or later and an Android phone with Android 10 or later. List based on the Google Play device catalogue.

Available · Get it on Google Play

Huawei Watch

HarmonyOS · AppGallery

Huawei2 models
Watch 5Watch Ultimate

The watch app from AppGallery already works on its own today: the entire match is run on the watch. The connection to the phone follows in December (see “In progress”).

Available

In progress

Expected dates, depending on approvals by Huawei

  • New for Huawei Watch 5 and Ultimate: connection to Android phones (Huawei phones and other Android phones with Huawei Health), squad to the wrist, match report back to the phoneDecember 2026
  • Huawei phones: WhistleOS on AppGalleryDecember 2026
  • Huawei Watch GT 5, Watch GT 6, Watch GT 7 and Watch Fit 4: leaner version with all the basicsEarly 2027
  • Connect a Huawei watch to the iPhone2027

Your watch is missing? Email us at kontakt@elbe-productions.de.

In progress

Privacy in the app

  • Sign in with your Google or Apple account, no separate registration.
  • On first launch the app asks for your consent. You can decline at any time.
  • Photos for the AI import are only sent to our AI service for analysis.
  • All details in our privacy policy (in German). Questions to kontakt@elbe-productions.de