About CR Deck Builder

What Is This Site?

CR Deck Builder helps Clash Royale players find decks that actually work in their arena. Instead of copying a random deck from social media, you can browse top-performing decks filtered by the cards you already own — so every recommendation is something you can build right now.

Where Does the Data Come From?

All deck data is sourced from the official Clash Royale API. We sample battle logs from top-ranked players across multiple regions, then calculate win rates using a Bayesian average to prevent small-sample flukes from skewing the rankings.

Decks are assigned to arenas based on card unlock levels — if a deck contains a card that unlocks in Arena 14, that deck appears on the Arena 14 page and above, not below.

How Are Decks Ranked?

Each deck is scored by combining its win rate and usage rate. A deck needs to perform well and be played frequently to rank highly. We apply a Bayesian average so a deck with only a handful of matches can't outrank a proven meta choice just because of an early lucky streak.

Who Built This?

CR Deck Builder is an independent project. It is not affiliated with, endorsed, sponsored, or approved by Supercell. Clash Royale and all related assets are trademarks of Supercell.

Contact

Have feedback or questions? Reach out at chuluosen4869@gmail.com.