Comparison

Chess Clock vs OTB Clock

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

Head to head
About

Chess Clock

This app provides a reliable and accurate chess clock for various game formats, including blitz and rapid play. It offers essential features for over-the-board matches with a clean interface and supports common timing increments and delays.

Highlights
  • Fischer increment support
  • Bronstein delay support
  • US delay support
  • Instant turn switching
  • Clear flag detection
  • Pause game functionality
  • Haptic feedback
Features
Read full description

Chess Clock - Tournament Timer is a fast, accurate two-player chess clock built for real over-the-board games. Play blitz, rapid, classical and tournament chess with simple controls and reliable timing. Choose from popular game lengths and use Fischer increment, Bronstein delay or US Delay directly from the main clock setup. No ads. No subscription. Just play chess. FREE FEATURES • 1, 3, 5 and 10 minute time controls • Fischer increment • Bronstein delay • US Delay • Common increment and delay values • Quick tournament presets • Instant tap to switch turns • Automatic tenths display under 1 minute • Clear flag-fall detection • Pause and resume games • Record White wins, Black wins and draws • Game history with move count, time control and timestamps • Haptic feedback and end-of-game signal PRO - ONE-TIME UNLOCK Want more control? Unlock Pro once for advanced customization: • Set custom game lengths • Create custom increment and delay values • Fine-tune time controls beyond the standard options • Access advanced custom tournament setups One purchase. No subscription. No ads for anyone. Whether you're playing a quick blitz game, a club match or a longer tournament game, Chess Clock gives you a clean, distraction-free clock with the timing modes you need.

About

OTB Clock

Features
Read full description

OTB Clock is a precise chess clock for over-the-board games. Supports all standard time controls from bullet to classical. Features: - Bullet, Blitz, Rapid, and Classical presets - Fischer increment support - Move counter - Tap-to-switch interface - Screen stays on during games - Custom time control creation Premium unlocks all time control presets and custom time controls. Free users get 3-minute, 5-minute, and 10-minute presets. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://frexx.top/privacy Privacy Policy: https://frexx.top/otbclock/privacy.html Terms of Use: https://frexx.top/otbclock/terms.html

Screenshots

Chess Clock4 screens
OTB Clock3 screens

Verdict

The call

Chess Clock and OTB Clock are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Chess Clock sells 1 one-off in-app purchase and OTB Clock sells 1 in-app purchase, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chess Clock ships an update every 3 weeks, OTB Clock every 2 weeks. Both last shipped on September 19, 2026.

ScorecardNo meaningful differences
Chess Clock versus OTB Clock: the parameters behind the verdict, then further details
ParameterChess ClockOTB Clock
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperLiamyte OÜ杰 向

In-app purchases

1 purchases

Chess Clock

One-time1
  • Pro Unlock – Lifetime$3.99
1 purchases

OTB Clock

Subscriptions1
  • Premium — Yearly3 Days trial$19.991 Year

Questions

Is Chess Clock free?
Chess Clock is free to download, with in-app purchases available.
Is OTB Clock free?
OTB Clock is free to download, with in-app purchases available.
Do Chess Clock or OTB Clock have ads?
Neither Chess Clock nor OTB Clock shows ads.
Which is updated more often, Chess Clock or OTB Clock?
Chess Clock ships an update every 3 weeks, and OTB Clock every 2 weeks. Most recently, Chess Clock was updated on September 19, 2026 and OTB Clock on September 19, 2026.

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