Comparison

Digital Chess Clock vs Chess Prep Pro Openings

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

Head to head
About

Digital Chess Clock

This application transforms your iPhone into a digital chess clock. It displays move counts and remaining time, with customizable settings for delays and sound. Easily adjust clock times and manage game flow with intuitive pause and reset functions.

Highlights
  • Digital chess clock functionality
  • Displays move counts and remaining time
  • Customizable delay types (None, Bronstein, Fisher)
  • Adjustable clock times
  • Sound volume control
  • Pause and reset functions
Features
Read full description

This iPhone application allows the phone to act as a chess clock. The phone is placed to the side of the board with white being at the bottom of the phone, black at the top. The number of moves made is displayed, with the remaining number of moves left to make displayed in brackets. Pressing the start button causes the clock to start depending on whose turn it is to move. Once the clock is started the clock for the person to move starts counting down and the Clock text color changes to Black. The reset button, settings button and clock adjustment buttons are not available whilst the clock is running. Pressing the pause button whilst the clock is running will stop the clock and re-enable the settings, reset & clock adjust buttons (see the initial clock above). There are a number of setting to control the sound, the clock delay type and the initial clock settings. Pressing the settings button (the small letter i to the right of the start button) whilst paused brings up the setting display. The volume of the ticking is controlled by the slider on the settings page, moving it to the left reduces the volume of the clock. There are 3 settings for the delay type None - the clock will count down from the time the player makes a move. Bronstein - the clock will count down until the player makes a move at which point the delay time is added to the display. If the player takes less than the delay amount to make a move then only the amount of time taken to make the move is added. Fisher - the Delay amount is added to the time left and then the clock starts counting down. Each clock can be adjusted separately by pressing the adjust clock button (the small blue chevron at the bottom right of each clock). The clock time can be adjusted by pressing the appropriate amount of time to add or subtract (scroll down to see the times to subtract).

About

Chess Prep Pro Openings

Master chess openings by building custom repertoires and training your memory. Analyze opponent moves, discover blind spots, and utilize an advanced engine for in-depth preparation. Expand your knowledge with downloadable repertoires and import/export PGNs.

Highlights
  • Custom chess opening repertoires
  • Repertoire training and memory sharpening
  • Blind spot finder against player games
  • Chess openings player database
  • Advanced StockFish engine analysis
  • Downloadable and importable repertoires
Features
Read full description

Master chess openings: Build chess opening repertoires & memorise your openings.Chess Prep Pro is the ultimate chess openings app, designed to perfect your openings and elevate your game through custom chess opening repertoire creation and training. How does it work? Chess Prep Pro allows you to create your own custom chess openings repertoires, and prepare for any opponent move. A chess opening repertoire is an opening plan that contains player responses for opponent moves in the opening phase of the game. With a chess opening repertoire, you will not be left scrambling to find the best move during a real game, as you will already remember the best move from studying and practicing your repertoire. Discover Chess Prep Pro's Features: - Custom Chess Opening Repertoires: Build unlimited custom repertoires for any chess opening. Add as many moves and variations as you need to be prepared for every game. - Repertoire Training: Sharpen your memory with chess opening repertoire training. The app challenges your memory with random positions from your opening repertoire, tracking your progress and helping you master every move. - Blind Spot Finder: Stay ahead of your opponents with our blind spot finder feature that analyses your chess openings repertoire against billions of player games, identifying the most likely opponent moves that you did not prepare for. - Chess openings player database: You can use a player openings database that contains billions of moves to find out the most likely opponent move to prepare for. - Advanced Engine: Utilize the latest StockFish engine for in-depth analysis and uncover the best responses to any situation on the board. - Downloadable opening repertoires: Expand your opening knowledge with an ever-growing library of specially created and sourced opening repertoires, curated for your success. - Import / Export: Easily import and export PGNs to and from the app. You can even import liches studies. Master your chess openings now !

Screenshots

Digital Chess Clock4 screens
Chess Prep Pro Openings4 screens

Verdict

The call

The clearest difference is rating: Digital Chess Clock at 5.0 against Chess Prep Pro Openings's 4.5. Digital Chess Clock also leads on in-app purchases (none vs 3) and ads (none vs shown). Chess Prep Pro Openings's advantage is update cadence (fortnightly vs every 4 months) and ratings volume (22 vs 2). On price 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 Prep Pro Openings sells 3 in-app purchases, starting at $3.99 per month. Digital Chess Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Digital Chess Clock holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Chess Prep Pro Openings has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 89% of Digital Chess Clock's written reviews are positive against 75% of Chess Prep Pro Openings's.

UpkeepUpdate frequency

Digital Chess Clock ships an update every 4 months, Chess Prep Pro Openings fortnightly. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

Scorecard8 real differences · 2 level
Digital Chess Clock versus Chess Prep Pro Openings: the parameters behind the verdict, then further details
ParameterDigital Chess ClockChess Prep Pro Openings
PriceFreeFree
Rating5.0 (2 ratings) — better4.5 (22 ratings)
Positive reviews88.9% of reviews — better75.0% of reviews
Number of ratings222 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size1 MB214 MB
Age rating4+4+
DeveloperPhilip BevanTomasz Bogun

Customer experience

Digital Chess Clock

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

Chess Prep Pro Openings

All ratings22 ratings
Positive86.4%
Neutral4.5%
Negative9.1%
Written reviews24 reviews
Positive75.0%
Neutral4.2%
Negative20.8%

In-app purchases

None

Digital Chess Clock

No in-app purchases

3 purchases

Chess Prep Pro Openings

Subscriptions2
  • Monthly premium subscription$3.991 Month
  • Yearly premium$24.991 Year
One-time1
  • Lifetime Premium$59.99

Questions

Is Digital Chess Clock free?
Digital Chess Clock is free to download, with no in-app purchases.
Is Chess Prep Pro Openings free?
Chess Prep Pro Openings is free to download, with in-app purchases available.
Which has better reviews, Digital Chess Clock or Chess Prep Pro Openings?
Digital Chess Clock is rated higher. Digital Chess Clock averages 5.0 out of 5 from 2 ratings, while Chess Prep Pro Openings averages 4.5 from 22 ratings.
Do Digital Chess Clock or Chess Prep Pro Openings have ads?
Chess Prep Pro Openings shows ads; Digital Chess Clock does not.
Which is updated more often, Digital Chess Clock or Chess Prep Pro Openings?
Digital Chess Clock ships an update every 4 months, and Chess Prep Pro Openings fortnightly. Most recently, Digital Chess Clock was updated on October 16, 2026 and Chess Prep Pro Openings on October 15, 2026.

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