{"game_intel_data":{},"featured_reviews":[{"content":"Like the title suggests, My ELO has risen by 1000 after getting this app! The opening repertoire builder is the main attraction, but don’t sleep on the master games. Good opening muscle memory is important but those master games really help you see what kind of ideas you should be looking for in the middle game and end game.\n\nA five star is more than fair but I still do have some requests to make this app more useful long term, even after Ive locked in opening theory.\n\nThese are my requests:\n\n1. a way to drill the “how to play from here” suggestion when you reach your coverage goal for each line. Instead of practicing individual moves, the goal would be to memorize the key concepts from those suggestions. Sure I could do that with flash cards but to be able to do the whole thing in the app would be very helpful.\n\n2. I’d like to be able to nickname all my opening lines using the annotations in the builder, and to be able to associate entire master games with those specific lines—a way to save snippets and assign them to my opening line would help too!! Then when I play through a master game, or practice, I can choose to hide or show the name of the line that I’ve created.\n\nSince using Chessbook, I’ve improved massively since I’m usually able to build an opening advantage. However, a common trend is that I tend to lose that advantage in the middle game because that’s where the muscle memory ends and sound ideas have to begin. If I also can build an arsenal of ideas to supplement my opening knowledge, this app will allow me to go even higher and keep me from plateauing. \n\nRegardless, thank you to the devs for this great product!","version":"1.3.2","date":"2026-03-31T00:00:00Z","rating":5,"app_id":6466343415,"username":"Neo-C","title":"+1000 ELO after downloading Chessbook!!","country":"US","tags":["feature_requests","service"],"review_id":13907411637},{"content":"I can't remember the last time I wrote an App Store review. But I have to for this app. Built in engine, % seen in GM games, names for variations 7+ moves in. \n\nThe free options are fantastic, and i went to pro strictly to support the devs as I have my entire (limited) repertoire in and only use 50%. \n\nIf you have any experience with file management, then the structures of how to arrange your openings help determine the built in spaced repetition. If you have one major line you wanna flush out with several variations, add that and practice. If you have several 5-7 move deep shorter openings (common for low elo like myself) it's easy to set those up and get more familiar with all of them after two weeks and not even realize it. \n\nThe only "effort," I put in was tapping through the suggested responses with what I see in my games. Now the platform offers me spaced learning, games with similar tactics, and common variations to continue a line once I'm familiar. \n\nAND THEY HAVE A WEB PLATFORM FOR FREE! \n\nAn amazing app that's already improved my openings greatly with the least amount of work put into having it be useful. 6/5 new standard","version":"1.2.1","date":"2024-02-13T00:00:00Z","rating":5,"app_id":6466343415,"username":"Fakename1234567","title":"Best Opening Trainer Out","country":"US","tags":[],"review_id":10934311288},{"content":"This app is literally the answer to my prayers, and that it is an actually sensible system for learning openings that doesn’t require memorizing extremely complicated if/then charts\n\nThe only issue is that I wish it would pause for a moment after you complete a move sequence so that you can absorb the position\n\nThe instructions could also be a little bit more clear on how to get started because I didn’t realize how great it is until I really stuck with it","version":"1.2.117","date":"2025-02-21T00:00:00Z","rating":5,"app_id":6466343415,"username":"John Ennis","title":"Incredible app for learning openings, just a few small issues","country":"US","tags":["accessibility","performance_and_bugs"],"review_id":12335953878}],"related_apps":[{"app_id":913335252,"app_view_url":"/ios/us/brilliant-org/app/brilliant-learn-math-coding/913335252/","country":"US","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/44/e3/7c/44e37cd0-0773-1f6b-e143-64af1cd48bff/AppIcon-0-0-1x_U007epad-0-1-0-85-220.png/150x150bb.jpg","name":"Brilliant: Learn Math & 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Key features:
• Create a custom repertoire
• Train with spaced repetition
• Find gaps automatically
• Avoid obscure moves
• Handle transpositions
• Find mistakes in your online games
• Fast & modern interface
“A fun and simple way to build an opening repertoire based on probabilities of most likely lines. You will actually learn the moves that will happen on the board!”
—Grandmaster Eugene Perelshteyn
FIND THE GAPS IN YOUR REPERTOIRE BEFORE YOUR OPPONENTS DO
Chessbook calculates your coverage per opening so you always know what to work on.
PICK THE BEST MOVES TO MAXIMIZE YOUR WIN-RATE
Weigh up your options by looking at stats from master games, engine evaluation and results at your level.
ONLY SPEND TIME ON THE MOVES YOU'LL ACTUALLY SEE
Most books and courses are written by masters for masters. Chessbook lets you avoid obscure grandmaster lines and focus your effort on the moves that are common at your level.
TARGETED PRACTICE MEANS YOU'LL NEVER FORGET A MOVE
Chessbook uses spaced repetition, a scientifically proven technique to memorize openings quickly and thoroughly.
COLLECT ALL YOUR OPENINGS IN ONE PLACE
Nobody gets their whole repertoire from a single course or book. Chessbook lets you combine openings from multiple sources to create a custom repertoire just for you.
REVIEW YOUR ONLINE GAMES FOR OPENING MISTAKES
Get instant feedback on how well you're sticking to your repertoire. Chessbook supports both Lichess and Chess.com
LEARN MIDDLEGAME PLANS FOR ANY OPENING
See how top players handle the positions that result from the openings you play.
CHESSBOOK PRO
Chessbook Pro gives you the ability to add unlimited moves to your repertoire! Free users can add 400 moves.
Terms of Use: https://chessbook.com/terms-and-conditions.html
Privacy Policy: https://chessbook.com/privacy-policy.html","app_summary":"The app was last updated on 19 June 2026. Released in US on 04 October 2023 and globally on 04 October 2023. 'Chessbook - Master openings' belongs to the 'Education' category maintaining a content rating of '4+'. Last month's estimates were < 5k downloads and < $5k revenue. The app is available in United Kingdom, United Arab Emirates, and South Africa and being advertised actively. Sign up / Sign in to learn more about the time spent, session durations, usage & engagement (DAU, WAU, MAU), retention, churn, marketshare, growth trends, and other market statistics.","subtitle":"Your personal opening book","promo_text":""},"has_in_app_purchases":true,"installs":null,"language":"EN","support_url":"https://chessbook.com","top_countries":["GB","AE","ZA"],"valid_countries":["AE","AO","AR","AT","AU","AZ","BE","BF","BG","BH","BJ","BO","BR","BY","CA","CG","CH","CI","CL","CM","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GE","GH","GR","GT","HK","HR","HU","ID","IE","IL","IN","IQ","IT","JO","JP","KE","KH","KR","KW","KZ","LA","LB","LK","LT","LU","LV","LY","MA","ML","MM","MO","MT","MX","MY","MZ","NG","NI","NL","NO","NZ","OM","PA","PE","PH","PK","PL","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SN","SV","TH","TN","TR","TW","TZ","UA","UG","US","UY","UZ","VE","VN","YE","ZA","ZM","ZW"],"available_countries":["US","AU","CA","FR","DE","GB","IT","JP","KR","RU","DZ","AO","AR","AT","AZ","BH","BB","BY","BE","BM","BR","BG","CL","CO","CR","HR","CY","CZ","DK","DO","EC","EG","SV","FI","GH","GR","GT","HK","HU","IN","ID","IE","IL","KZ","KE","KW","LB","LT","LU","MO","MG","MY","MT","MX","NL","NZ","NG","NO","OM","PK","PA","PE","PH","PL","PT","QA","RO","SA","RS","SG","SK","SI","ZA","ES","LK","SE","CH","TW","TH","TN","TR","UA","AE","UY","UZ","VE","VN","BO","KH","EE","LV","NI","PY","AF","GE","IQ","LY","MA","MZ","MM","YE","BJ","BF","CM","CG","CI","JO","LA","ML","SN","TZ","UG","ZM","ZW"],"pre_order_countries":[],"website_url":"https://chessbook.com","app_id":6466343415,"app_view_url":"/ios/us/chessbook/app/chessbook-master-openings/6466343415/","country":"US","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/91/a2/ff/91a2ff4d-2ef8-f9fe-a76a-189371083974/AppIcon-0-0-1x_U007epad-0-1-85-220.png/150x150bb.jpg","name":"Chessbook - Master openings","os":"ios","price":{"currency":"USD","value":0,"string_value":"$0.00","subunit_to_unit":100},"publisher_id":1707243137,"publisher_name":"Chessbook","publisher_profile_url":"/publisher/ios/1707243137","rating":4.885595423816953,"rating_breakdown":[16,5,22,97,1783],"rating_count":1923,"country_release_date":1696377600000,"current_version":"1.3.31","file_size":187418624,"first_released_in":["US","AU","CA","FR","DE","GB","IT","JP","KR","RU","DZ","AO","AR","AT","AZ","BH","BB","BY","BE","BM","BR","BG","CL","CO","CR","HR","CY","CZ","DK","DO","EC","EG","SV","FI","GH","GR","GT","HK","HU","IN","ID","IE","IL","KZ","KE","KW","LB","LT","LU","MO","MG","MY","MT","MX","NL","NZ","NG","NO","OM","PK","PA","PE","PH","PL","PT","QA","RO","SA","RS","SG","SK","SI","ZA","ES","LK","SE","CH","TW","TH","TN","TR","UA","AE","UY","UZ","VE","VN","BO","KH","EE","LV","NI","PY","AF","GE","IQ","LY","MA","MZ","MM","YE","BJ","BF","CM","CG","CI","JO","LA","ML","SN","TZ","UG","ZM","ZW"],"minimum_os_version":"15.0","publisher_country":null,"recent_release_date":1781827200000,"release_date":1696402800000,"release_status":"REGIONAL_RELEASE","supported_languages":["EN"],"worldwide_release_date":1696377600000,"store_removal_date":null,"cohort_id":null,"worldwide_last_month_revenue":{"unit":"cent","type":"currency","currency":"USD","value":100000},"worldwide_last_month_downloads":{"unit":"unit","type":"integer","value":1000},"category_rankings":{"app_id":6466343415,"country":"US","ipad":{"top_free":null,"top_grossing":null,"top_paid":null},"iphone":{"top_free":null,"top_grossing":null,"top_paid":null}}}