Referee Yellow card, Whistle
Referee Yellow card, Whistle Summary
Referee Yellow card, Whistle is a ad-supported iOS app in Tools by Ryouhei Azuma. Released in May 2023 (3 years ago). It has 86 ratings with a 4.76★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 231 monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store last updated Apr 16, 2026
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Referee Yellow card, Whistle SDKs Summary
App not yet scanned for SDKs.
4.76★
Ratings: 86
Screenshots
App Description
It is a simple referee application that can be used in sports etc.
It can sound a whistle, can be used for sports refereeing, training, when you want to call something, pranks, etc.
You can put out four kinds of cards of yellow card, red card, orange card, green card in full screen.
It may be interesting to use it as a referee in sports games or when playing with friends.
It is designed to be easy to use with a simple screen and functions, so please try it.