Referee Yellow card, Whistle vs Nova Mobile Security
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Referee Yellow card, Whistle
This utility app provides a digital referee toolkit for sports and other situations. It features a whistle sound and full-screen display of various colored cards for judgment calls. Designed for simplicity, it's suitable for games, training, or even pranks.
- Whistle sound functionality
- Full-screen yellow, red, orange, and green cards
- Simple and easy-to-use interface
- Suitable for sports refereeing
- Useful for training and games
- Can be used for pranks
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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.
Nova Mobile Security
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Nova helps you make safer decisions about links, networks and accounts on iPhone. Nova is a lookup tool. You choose something to check — a link, a QR code, an email address, your Wi-Fi connection — and Nova shows you what public databases and your iPhone's own system information say about it. WHAT YOU CAN CHECK • Links and QR codes Look up a link or QR code before you open it. Nova submits the address to VirusTotal, a publicly available URL reputation service, and shows you what it reports, including how many reputation engines have flagged that address. • Data breaches Find out whether your email address appears in known, publicly documented data breaches. Results come from Have I Been Pwned and XposedOrNot. Password checks use Have I Been Pwned's k-Anonymity model, so your full password is never sent. • Wi-Fi connection details View details about the network you are connected to, such as its encryption type, using information your iPhone already provides. • Permission overview See whether camera, microphone and location permissions are granted, as reported by iOS, and open the Settings screens where you manage them. Permissions are controlled by iOS; Nova only displays what iOS reports. • Lookup history Keep a record of the links and email addresses you have checked, so you can look back at earlier results. WHAT NOVA DOES NOT DO Nova does not analyze your device. It does not scan the files or apps on your iPhone, it does not assign your device a security score or status, and it does not tell you whether your device is safe. iOS does not allow apps to do these things, and Nova makes no such claim. Nova does not read your messages, photos or browsing history, and does not monitor other apps. Every lookup is one you start yourself, about an item you choose, and every result describes only that item. SUBSCRIPTION Nova is free to download. A subscription is required to view lookup results. Nova Premium is an optional auto-renewing subscription. It gives you unlimited link and QR code lookups, unlimited email breach lookups, Wi-Fi connection details, the permission overview and your full lookup history. Prices may vary by region and are shown in the app before purchase. Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Privacy Policy: https://mwguard-c3b25.web.app/privacy Terms of Service: https://mwguard-c3b25.web.app/terms Support: info@pera.software
Screenshots
Verdict
The clearest difference is ads: Nova Mobile Security at none against Referee Yellow card, Whistle's shown. Nova Mobile Security also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
Referee Yellow card, Whistle ships an update every 2 months, Nova Mobile Security every 3 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.
| Parameter | Referee Yellow card, Whistle | Nova Mobile Security |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (51 ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 51 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 87 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryouhei Azuma | Pera Soft Dijital Cozumler Anonim Sirketi |
In-app purchases
Referee Yellow card, Whistle
No in-app purchases
Nova Mobile Security
No in-app purchases
Questions
Is Referee Yellow card, Whistle free?
Is Nova Mobile Security free?
Do Referee Yellow card, Whistle or Nova Mobile Security have ads?
Which is updated more often, Referee Yellow card, Whistle or Nova Mobile Security?
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