Blunderbase

Pricing

Blunderbase reads your completed Chess.com and Lichess games, finds the moments that cost you the most, and gives them back as practice.

Every new account starts with seven days of Pro. No card, and nothing to cancel: after the week you are on Free unless you choose Pro.

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Free

$0

Import the last ninety days of games; Stockfish analyzes them in your browser while Blunderbase is open. Review any game move by move with its story and accuracy, practice the positions where you went wrong, and see your puzzle stats and top three insights. The weekly email is included.

The engine’s reading of every position is free and unmetered.

Everything you use today stays free.

Pro

$4.99 a month, or $39 a year (save 35%)

Everything in Free, plus:

  • Your games reviewed for you. Automatic imports every half hour, analyzed on our server, so they are usually ready before you open the app.
  • A review after each session: one email with your results, the move a loss turned on, and the new puzzles.
  • Ask the coach from any lesson or finished puzzle: up to 15 answers a day and 200 a month.
  • Study other players. Follow anyone on Chess.com or Lichess and review their games the same way.
  • A monthly report and every insight, not just the top three.
  • A weekly program: one weakness from your own games, three short sessions, and a check against the games you play next.
  • Twelve months of game history, against ninety days on Free.

Cancel any time; 14 days for a full refund.