ChessTools.it

ChessTools.it

Chess clock and Elo calculator

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Free

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Details

Released
July 28, 2026
Updated
October 10, 2026

Features

ChessTools.it screenshot #1 for iPhone
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The two tools every over-the-board player needs, now native on your iPhone. No account, no sign-up: clock and calculator both work offline. CHESS CLOCK A real tournament clock, not a toy timer. - Read it from the side: both time displays turn a quarter turn, so the two players read them from the board, the way a real clock sits to the right of Black - An analog clock face if you want one: a mechanical tournament dial where the flag drops at twelve and the hands keep going (for time controls without increment) - 13 time controls, from 1-minute bullet to 90+30 classical, plus a custom one you set yourself - Fischer increment support - Works with ChessFlow: playing the computer in ChessFlow on your iPad, ChessFlow presses this clock for you (same Wi-Fi or Personal Hotspot) - Tap with any finger, even several at once - the clock never misses a press - When a flag falls the clock does not stop: a blinking flag appears and play continues, exactly as on a real board - Adjust either side's time and move count mid-game, for penalties and corrections - Move counter and side-to-move indicator for both colours - Your last time control is remembered, so you start where you left off - The screen stays awake while the clock runs FIDE ELO CALCULATOR The same calculator used on chesstools.it, packaged natively. - Rating change with the correct K-factor, including the automatic reduction rules - FIDE performance rating, expected score against the field, and how your result compares to your rating - Per-game breakdown of every opponent - Export the whole report as a PDF (requires a connection) TOURNAMENT TOOLS Quick access to the pairing and tournament tools on chesstools.it. Free. No advertising.
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What's New in ChessTools.it

1.2.0

October 10, 2026

ChessFlow can now press this clock for you. Playing the computer in ChessFlow on your iPad, ChessFlow tells the clock on your iPhone whose turn it is: you play, it presses. Turn on "Remote control from ChessFlow" in Settings, keep both devices on the same Wi-Fi - or put the iPad on your iPhone's Personal Hotspot - and leave ChessTools open on the clock. Your fingers still work as always, and if the link drops the clock simply carries on.

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