Cal vs Referee Race
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cal
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The Cal-Bridge CampusGroups app allows community members to track Cal-Bridge activities, communicate with others in the community, register for and sign into events, submit forms, and find program resources
Referee Race
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Referee Race is the ultimate training app for karate referees and practitioners who want to master the rulebook in a fun and competitive way. Whether you're preparing for a referee certification or simply want to deepen your knowledge of karate rules, Referee Race makes learning engaging and competitive. GAME MODES • Quiz : Test your knowledge across Kumite, Kata, or mixed modules • Daily Challenge : A new timed quiz every day to keep your skills sharp • Duels : Challenge another player in real-time 1v1 battles • Exam : Simulate real exam conditions with 50 questions in 20 minutes • Group Quiz : Compete in multi-player sessions with a live leaderboard TRACK YOUR PROGRESS View your stats, climb the leaderboards (daily, weekly, seasonal, global), and earn badges as you improve.
Screenshots
Verdict
Cal and Referee Race are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Cal | Referee Race |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 63 MB | 35 MB |
| Age rating | 17+ | 4+ |
| Developer | University of California, Irvine | Cedrick Wong |
In-app purchases
Cal
No in-app purchases
Referee Race
No in-app purchases
Questions
Is Cal free?
Is Referee Race free?
Do Cal or Referee Race have ads?
Other comparisons
