Comparison

Go Clock vs Chess Clock & Game Timer

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Go Clock

Features
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The Go clock that speaks byo-yomi. Digits large enough to read across a goban, two halves facing opposite directions, and tap zones you can hit without looking down. Byoyomi Timer turns your iPhone or iPad into the clock your club has always needed. TIME SYSTEMS โ€ข Japanese byo-yomi โ€” main time plus numbered periods that reset in full with every completed move โ€ข Canadian overtime โ€” stone-based blocks such as 25 stones in 10 minutes, with a tappable stone counter โ€ข Fischer bonus time โ€” with optional cap, the current AGA standard โ€ข Ing overtime โ€” three purchasable periods, two penalty points each โ€ข NHK format โ€” 30 seconds a move backed by ten one-minute reserves โ€ข Progressive overtime โ€” the stone quota grows with each block โ€ข Sudden death โ€” a plain absolute limit PRESETS FOR EVERY OCCASION Blitz, quick game, club standard, tournament, tournament Canadian, AGA bonus time, NHK style, professional game, title match and Ing official. Edit any of them, or build and name your own. A VOICE THAT COUNTS FOR YOU The last ten seconds of every period are announced aloud, so you can keep your eyes on the board. Available in English, German, Japanese, Korean and Mandarin โ€” chosen independently of the interface language. Prefer beeps, or silence? Both are one tap away. PASS BUTTONS Two consecutive passes stop the clock, exactly as the game does. TEACHING GAMES AND HANDICAPS Both clocks are fully independent. Different systems, different times, different period counts on each side โ€” a teacher can play three minutes against a student's forty. FOR REFEREES Time, periods and stones can all be corrected mid-game without restarting. WORKS ANYWHERE Fully offline, even in airplane mode. Runs on the Lock Screen as a Live Activity. No account, no ads, no tracking. Your settings and history stay on your device. ALSO AT HOME WITH Shogi, chess, Xiangqi, Gomoku and any other two-player board game โ€” byo-yomi is the Shogi standard, and Fischer and sudden death come from chess. FREE AND PRO The core clock โ€” byo-yomi, Canadian, Fischer, sudden death and per-move play โ€” stays free, without ads and without a time limit. Pro adds custom time systems, tournament presets, independent clocks for teaching games, fifteen further colour themes, sound packs, landscape mode, saved setups and game history. Available monthly, yearly, or as a one-time lifetime purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://byoyomitimer.com/privacy/

About

Chess Clock & Game Timer

Features
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Chess Clock turns your iPhone or iPad into the clock that sits between two players. Two huge tap zones, no menus in the way, and timing that stays exact from the first move to the last. FOUR TIMING MODES - Sudden death: the classic. Run out and you flag. - Fischer increment: time is added to your bank after every move you complete. - Bronstein delay: you get back what you spent on a move, up to the delay. - Simple (US) delay: your main time only starts running once the delay is used up. READY IN ONE TAP Blitz 3+2, Blitz 5+0, Rapid 10+0 and Classical 90+30 are built in. Build and save your own for club nights, with any name and an optional move-limit label. BUILT FOR THE BOARD - Both halves are mirrored, so the clock reads right-side up from either side of the table. - A move counter for each player. - Undo the last tap when someone hits the wrong half. - Pause and resume without losing or gaining a single second. - The screen never dims or locks during a game. - Close the app mid-game and pick the position back up where you left it. - Time odds for Black, an option for Black to move first, warning beeps at 60, 30 and 10 seconds, and time correction while paused EXACT, NOT APPROXIMATE The clock never counts ticks. Every reading is computed from timestamps, so a phone call, a notification or a trip to the home screen cannot make it drift. GAME HISTORY Games are saved when a flag falls or when you pick the result as you leave: the result, how long it ran, and how long each single move took for both players. Add a note, tag where you played, attach photos of the board or the scoresheet, and export the move times as a CSV file. CHESS CLOCK PRO Unlock three extra board themes (four with the free Classic) and three extra flag alert sounds (four with the free Classic Beep), and remove every ad. Pay once and keep it for good, or pick a weekly, monthly or yearly plan and cancel any time from your App Store settings. The clock, presets and history work completely offline. The free version shows ads, which need an internet connection (never during a game). No account, no sign-up, nothing to configure. Chess Clock is a timer for over-the-board play. It does not validate moves, enforce rules or record notation. COMMON QUESTIONS Which time controls does it handle? Sudden death, Fischer increment, Bronstein delay and simple US delay. Blitz 3+2, Blitz 5+0, Rapid 10+0 and Classical 90+30 are one tap away, and you can save your own. Does the clock drift? No. Every reading is computed from timestamps rather than counted ticks, so a call, a notification or the screen turning off cannot gain or lose a second. Someone tapped the wrong half โ€” can we fix it? Yes. Undo takes back the last tap, and you can pause and resume without gaining or losing time. Can both players read it? The two halves are mirrored, so the clock reads right-side up from either side of the board. Each side also has its own move counter. Does it check whether a move is legal? No. It is a clock for over-the-board play: it counts time and moves, not pieces. Positions, rules and the result stay with the players and the arbiter. What is free and what does Pro add? All four timing modes, the presets, your own saved controls, time odds, the warning beeps and the game history are free. Pro adds three extra board themes and three extra flag sounds, and removes the ads. Terms of Use: https://masaapps360.com/chessclock/terms/ Privacy Policy: https://masaapps360.com/chessclock/privacy/

Screenshots

Go Clock4 screens
Chess Clock & Game Timer4 screens

Verdict

The call

The clearest difference is ads: Go Clock at none against Chess Clock & Game Timer's shown. Chess Clock & Game Timer's advantage is iOS requirement (17.4 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Go Clock sells 3 in-app purchases, starting at $0.99 per month and Chess Clock & Game Timer sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences ยท 4 level
Go Clock versus Chess Clock & Game Timer: the parameters behind the verdict, then further details
ParameterGo ClockChess Clock & Game Timer
PriceFreeFree
Update frequencyโ€”Every 4 weeks
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.4 โ€” better
Further details โ€” not scored
Size14 MB6 MB
Age rating4+4+
DeveloperVincent GrellertGrima Hdez

In-app purchases

3 purchases

Go Clock

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$8.991 Year
One-time1
  • Byoyomi Timer Pro$24.99
4 purchases

Chess Clock & Game Timer

Subscriptions3
  • Weekly$0.997 Days
  • Monthly$1.991 Month
  • Yearly$2.991 Year
One-time1
  • Lifetime$3.99

Questions

Is Go Clock free?
Go Clock is free to download, with in-app purchases available.
Is Chess Clock & Game Timer free?
Chess Clock & Game Timer is free to download, with in-app purchases available.
Do Go Clock or Chess Clock & Game Timer have ads?
Chess Clock & Game Timer shows ads; Go Clock does not.

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