ChessFlex vs ChessGrind

ChessFlex is chess stripped back to the game. No accounts, no servers, no chat — just the board, the friends you choose, and a real rating that's yours. PLAY YOUR CIRCLE Connect by trading a QR code, in person or over iMessage. No global matchmaking, no strangers, no friend requests. The people across the board are people you picked. HUMANS — OR HUMAN-LIKE BOTS Five built-in bots from 400 to 2000 ELO play like real people at that level: they make human mistakes, not random ones. A real game and a real rating from your very first move. And when you've beaten them all, there's King — our own engine at full strength, and not human-like at all. FIDE-FORMULA RATING Every game updates your rating with the standard FIDE formula. It's your history, not your ceiling — anyone can challenge anyone, and a 1200 taking on a 2000 is courage, not a mistake. PLAY AT YOUR PACE Async by default — make a move, put your phone away, pick it up hours later. Or set a clock: Blitz, Rapid, Classical, or multi-day correspondence. THE BOARD IS THE CONVERSATION There's no chat box, ever. Players speak only in standard chess annotation symbols — !! for a brilliant move, ? for a mistake. Nothing personal can be exchanged, so there's nothing to moderate, and it's cross-language by default. PRIVATE BY DESIGN No email, no sign-up, no tracking, no ads. Your identity is your device; your games live on your device and travel only between you and your opponent. CHESSFLEX STUDY (optional) A one-time unlock that turns every game into a lesson: move-by-move analysis, win-chance insight in plain language, guided openings, and practice positions. Scan a chess diagram from a screenshot and play it out, or have the coach read its suggested line aloud. Playing, ratings, and opening names stay free, always. From Labham LLC. A sibling to LexFlex.

ChessGrind is a tracker for chess players who want to improve. Log your games, see your real numbers, build your opening repertoire, and keep a list of the mistakes that cost you, with a fix for each. No account, no tracking. Everything lives on your device and in your private iCloud, and syncs across your iPhone, iPad, and Mac. A GAME JOURNAL THAT ADDS UP Log every game with the result, the side you played, the time control, the opponent, and the opening. Filter by result and watch the journal grow into your record. YOUR REAL NUMBERS ChessGrind computes your win rate and your record split by color and by time control, so you learn that you score well with White in rapid but leak points in blitz as Black. The numbers come only from the games you log. A RATING CHART YOU CONTROL Note your rating whenever you check it and ChessGrind plots the trend. Keep separate lines for Chess.com blitz, Lichess rapid, or your over the board rating, and see the change over the last thirty days at a glance. A STUDY ROUTINE AND A STREAK Log study blocks by theme: tactics, endgames, openings, strategy, and game review. A streak counts the days you keep it up, a two week strip shows your rhythm, and a chart breaks down where your time actually goes. Turn on a daily reminder to protect the streak. THE LEAK LIST YOU ACTUALLY FIX Name the mistakes that keep costing you games. Give each one a category, the pattern behind it, and the fix you will use instead, then advance it from open to working to fixed with a tap. This is the feature that turns review into progress. OPENING REPERTOIRE Save the openings you play with the main line, the ECO code, and the plans and ideas behind them. Pull one into a game entry with a tap. EXPORT WHAT IS YOURS (PRO) Generate a one page PDF performance report with your record, win rates, streaks, rating, and open leaks, ready to print or share with a coach. Export your games, ratings, and leaks as CSV files with ISO dates for any spreadsheet. ON EVERY DEVICE ChessGrind syncs across iPhone, iPad, and Mac with iCloud. The iPad and Mac layout puts your dashboard and charts side by side. FREE VS PRO Free includes 20 games and 3 leaks with every tool: the journal, win rate stats, the rating chart, study streaks, and opening repertoire. ChessGrind Pro unlocks an unlimited game journal, unlimited leak tracking, and the PDF and CSV exports. ChessGrind Pro is a subscription at $3.99 USD per month or $24.99 USD per year, or a one time Lifetime unlock at $59.99 USD. Pro subscriptions renew automatically until cancelled. Payment is charged to your Apple Account at confirmation, and the subscription renews unless you turn off auto renew at least 24 hours before the period ends. Manage or cancel anytime in Settings > Apple Account > Subscriptions; cancellation applies at the end of the current period. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/