Referee Yellow card, Whistle

Developer: Ryouhei Azuma

Category: Tools

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4.2K installs

84 ratings

250 monthly active users

$<10K monthly revenue est.

IAP 0% · Ad 100%

Install Trends

Weekly +50

Trending

Monthly +117

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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 84 ratings with a 4.75★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 250 monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store metadata: updated Apr 16, 2026.

Store info: Last updated on App Store on Apr 16, 2026 .

SDKs, Trackers & Permissions

App not yet scanned for SDKs.

App Details

Store ID: 6449401491

First Released: 2023-05-22

Store Last Updated: 2026-04-16

In-App Purchases: No

Ads: Yes

Website: razuma.jp

App Store

Crawl Status: Success

AppGoblin First Crawled: 2023-10-20

AppGoblin Last Crawled: 2026-05-28

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-19

Ads.txt Crawl Status: Success

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4.75★

Ratings: 84

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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.