Comparison

Chess Prep Pro Openings vs chess.ceo

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

Head to head
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 !

About

chess.ceo

This app provides professional chess analysis tools, including engine analysis, a vast game database, and opponent preparation features. It allows users to analyze games, study master-level games, and follow live tournaments. An optional subscription unlocks advanced features like offline database access and a distraction-free analysis board.

Highlights
  • Engine analysis with Stockfish
  • 14 million master-level game database
  • Opponent search and repertoire study
  • Live tournament broadcasts
  • Full game analysis with PGN import
  • Organize and sync PGN files
  • Chess960 and chess clock
Features
Read full description

Whether you're a beginner learning openings or a tournament player preparing for your next opponent, Chess.ceo gives you professional chess analysis tools right on your phone. Engine Analysis Analyze any position with Stockfish, the world's strongest chess engine, running locally on your device, no internet required. Need more power? Cloud Engines let you run analysis on a dedicated cloud machine, billed per minute and only while it's running. 14M Game Database Explore over 14 million master-level games with real-time opening statistics. For any position, instantly see which moves were played, how often they led to wins, and at what rating level. Filter by rating range and time control to find data relevant to your level. Endgame positions are covered by seven-piece Syzygy tablebases showing perfect play with distance-to-mate. Opponent Preparation Search any player by name, country, or FIDE title. View their game history, ratings, and most-played openings. Study their repertoire and identify weaknesses before your next tournament game. Link players across FIDE, Lichess and Chess.com profiles. Live Tournament Broadcasts Follow ongoing tournaments with live game boards, per-board evaluation bars, and live standings. Jump straight into any player's games while a round is in progress. Full Game Analysis Import games via PGN, paste from clipboard or load from file. The engine evaluates every move and shows where mistakes were made. Build a complete variation tree with main lines and sidelines, annotate key moments, and save your analysis for later. PGN Files Organize your analyzed games into files and folders, synced across devices when you sign in. Import hundreds of games at once, or export to share with coaches and training partners. Additional Features • Chess960 (Fischer Random) with one tap • Chess clock with customizable time controls • Position editor for setting up any position • Search games by position across your files • Landscape and tablet support • Seven languages: English, German, Spanish, French, Russian, Chinese, and Arabic Free to Use All of the above is free, no ads. Create an account and start analyzing. CEO Tier: Optional Subscription For players who want more: • Pro Board: full-screen, distraction-free analysis • Full database offline: all 10 million games on your device, no connection needed • Higher daily limits on search, preparation, and database queries • More storage for your PGN files Subscribe monthly, cancel any time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://chess.ceo/docs/tos Privacy Policy: https://chess.ceo/docs/privacy

Screenshots

Chess Prep Pro Openings4 screens
chess.ceo4 screens

Verdict

The call

The clearest difference is rating: chess.ceo at 5.0 against Chess Prep Pro Openings's 4.5. chess.ceo also leads on ads (none vs shown) and review sentiment (100% vs 75%). Chess Prep Pro Openings's advantage is ratings volume (22 vs 2). On price, update cadence, in-app purchases and monetization model 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 and chess.ceo sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

chess.ceo 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: 75% of Chess Prep Pro Openings's written reviews are positive against 100% of chess.ceo's.

UpkeepUpdate frequency

Chess Prep Pro Openings ships an update fortnightly, chess.ceo every 4 weeks. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

Scorecard4 real differences · 6 level
Chess Prep Pro Openings versus chess.ceo: the parameters behind the verdict, then further details
ParameterChess Prep Pro Openingschess.ceo
PriceFreeFree
Rating4.5 (22 ratings)5.0 (2 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings22 — better2
Update frequencyFortnightly — betterEvery 4 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size214 MB151 MB
Age rating4+4+
DeveloperTomasz BogunCHESSGM OU

Customer experience

Chess Prep Pro Openings

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

chess.ceo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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
2 purchases

chess.ceo

Subscriptions1
  • CEO tier$5.991 Month
One-time1
  • Cloud Credits$8.99

Questions

Is Chess Prep Pro Openings free?
Chess Prep Pro Openings is free to download, with in-app purchases available.
Is chess.ceo free?
chess.ceo is free to download, with in-app purchases available.
Which has better reviews, Chess Prep Pro Openings or chess.ceo?
chess.ceo is rated higher. Chess Prep Pro Openings averages 4.5 out of 5 from 22 ratings, while chess.ceo averages 5.0 from 2 ratings.
Do Chess Prep Pro Openings or chess.ceo have ads?
Chess Prep Pro Openings shows ads; chess.ceo does not.
Which is updated more often, Chess Prep Pro Openings or chess.ceo?
Chess Prep Pro Openings ships an update fortnightly, and chess.ceo every 4 weeks. Most recently, Chess Prep Pro Openings was updated on October 19, 2026 and chess.ceo on October 20, 2026.

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