RoyaleTools

RoyaleTools starts from your own collection. Paste in a Player Tag, the public ID on every Clash Royale account, and Top Deck Finder suggests decks your card levels can support. Deck Finder by Cards does the same against decks seen in the top 200 of Ranked play, and Deck Improver compares a deck you already use with recent alternatives from that sample.

That's the part worth trying first. A deck that wins at the top of the ladder helps less when half its cards sit well below the rest of your collection.

The War Deck Builder handles one specific constraint, four decks with no card repeated across them. A progression calculator tracks gold, Gems, missing cards, Evolutions and Heroes, and a Daily Plan suggests decks, upgrades and War moves for the day. Clan Activity gives a public snapshot of a clan's War results, members and donations, which a clan leader could use to see who's been active. Further pages add card usage among top players, a tier list, a balance-change log and a head-to-head tracker.

The Play section is lighter. Guess the Card, Card Hangman, Elixir Math, Pixel Puzzle and more than a dozen other games and puzzles run on card knowledge.

The site is free, needs no account and is paid for by ads. Its privacy policy says the Head-to-Head Tracker stores observed top-100 Path of Legend matches, with player tags, names and results, as a sample rather than a complete record. Read the meta pages the same way, as what the site has collected rather than official data. RoyaleTools labels itself unofficial and not endorsed by Supercell.