About this app

Chessbook PGN Library is a private chess notebook for players who want to review their own games without a social feed or cloud account. WHY CHESSBOOK - Paste standard PGN and keep the tag roster, movetext, comments, NAGs, and variations readable. - Browse your personal game library by opponent, result, ECO code, opening name, and move count. - Mark critical positions with a ply number, note, and chess glyph so the lesson is easy to revisit. - Review your opening results by ECO and root move pattern. - Keep a repertoire list for the lines you are studying. - Store everything on device with SwiftData. No account, no ads, no analytics SDK. FREE TIER - Store up to 50 games. - Import PGN, browse the move list, write notes, and mark positions. CHESSBOOK PRO - Unlimited games. - Opening-tree review. - Repertoire tracker. - Position diagrams. - PGN export. - Monthly and yearly auto-renewing subscription options. Chessbook is built for over-the-board and online players who want a calm, private place to remember what actually happened in their games. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Audience growth

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Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

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