Comparison

Chess Clock Blitz vs Chess Clock Duo

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

Head to head
About

Chess Clock Blitz

A reliable and fast chess timer for over-the-board games. Offers common time controls or custom setups for practice and tournaments. Features large tap zones, sound/haptic feedback, and clear display.

Highlights
  • Two-player chess clock
  • Multiple time controls (Bullet, Blitz, Rapid, Classical)
  • Large tap zones for play
  • Pause, resume, and reset functions
  • Custom player times
  • Sound and haptic feedback
  • Clear, high-contrast display
Features
Read full description

Chess Clock Blitz is a fast, reliable chess timer for over-the-board games. Start a clock in seconds, choose a common time control, or create the setup you need for casual games, club nights, and tournament practice. With Chess Clock Blitz, you can: • Start a two-player chess clock instantly • Play Bullet, Blitz, Rapid, and Classical time controls • Use large tap zones built for real over-the-board play • Pause, resume, and reset games quickly • Set custom player times • Use sound and haptic feedback for turn changes • Keep the display clear, high-contrast, and easy to read during play • Practice with common chess clock presets Chess Clock Blitz is designed to feel like a real tournament tool: simple when you need speed, flexible when you need serious time controls. Paid features: • Fully custom Fischer increment • Bronstein delay • Simple / US delay • Japanese byo-yomi • Canadian overtime • Multi-stage tournament time controls • Unlimited saved presets • Tournament preset packs • Tournament lock mode • Advanced alerts and countdown options • Premium themes Download Chess Clock Blitz and turn your iPhone into a clean, dependable chess clock for your next game. To access paid features, consider purchasing Chess Clock Blitz Premium. Payment will be charged to your Apple Account at the time of purchase, or at the end of any free trial if offered. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current subscription period. You can manage your subscription and turn off auto- renewal at any time from your Apple Account settings. If you’ve previously purchased Chess Clock Blitz Premium, use Restore Purchase in the app to access your paid features. Terms of Use: https://www.chessclockapp.com/terms-of-service Privacy Policy: https://www.chessclockapp.com/privacy-policy

About

Chess Clock Duo

Features
Read full description

Chess Clock is the elegant, fair game timer for two players — no ads, no tracking, no distractions. Perfect for blitz, bullet, rapid and classic tournament games. Pick a time format, place your iPhone between you and start tapping: after each move a player taps their side and the opponent's clock starts. Clear, fast and distraction-free. FEATURES • Ready-made time formats for blitz, bullet, rapid and tournament • Custom time controls with base time, phases and increment (Pro) • Increment modes: Fischer, Bronstein and simple delay (Pro) • Large, easy-to-read display — even from across the table • Live Activity for the Lock Screen and Dynamic Island • 15 color themes — every color beyond classic black & white (Pro) • Sound packs including "Quiet" for silent tournament halls (Pro) • Landscape mode: clock flat on the table, both halves side by side (Pro) • Saved setups: load up to 10 configurations with one tap (Pro) • Game history: your last 10 games with time statistics (Pro) BUILT FOR OVER-THE-BOARD PLAY Time controls follow the formats you already play — from 3+2 blitz and 15+10 rapid to multi-phase FIDE tournament schedules that add time after move 40. Speed chess or a grandmaster-length game: no hourglass guesswork, no arguing about who flagged. CHESS CLOCK PRO Unlock every professional feature with Chess Clock Pro — monthly, yearly, or once and forever. Pick what suits you; subscriptions can be cancelled anytime. Whether at the club, at a tournament or at home on the kitchen table: Chess Clock puts a professional chess clock on your iPhone. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Chess Clock Blitz4 screens
Chess Clock Duo4 screens

Verdict

The call

The clearest difference is update cadence: Chess Clock Blitz at every 3 days against Chess Clock Duo's every 3 months. Chess Clock Blitz also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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 Blitz sells 2 in-app purchases, starting at $3.99 per month and Chess Clock Duo sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chess Clock Blitz ships an update every 3 days, Chess Clock Duo every 3 months. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 7 level
Chess Clock Blitz versus Chess Clock Duo: the parameters behind the verdict, then further details
ParameterChess Clock BlitzChess Clock Duo
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better26.0
Further details — not scored
Size60 MB11 MB
Age rating+44+
DeveloperKamil PodlasekVincent Grellert

In-app purchases

2 purchases

Chess Clock Blitz

Subscriptions2
  • Premium$3.991 Month
  • Premium$29.991 Year
3 purchases

Chess Clock Duo

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$8.991 Year
One-time1
  • Chess Clock Pro$24.99

Questions

Is Chess Clock Blitz free?
Chess Clock Blitz is free to download, with in-app purchases available.
Is Chess Clock Duo free?
Chess Clock Duo is free to download, with in-app purchases available.
Do Chess Clock Blitz or Chess Clock Duo have ads?
Neither Chess Clock Blitz nor Chess Clock Duo shows ads.
Which is updated more often, Chess Clock Blitz or Chess Clock Duo?
Chess Clock Blitz ships an update every 3 days, and Chess Clock Duo every 3 months. Most recently, Chess Clock Blitz was updated on October 31, 2026 and Chess Clock Duo on November 10, 2026.

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