{"schema_version":"1.0","generated_at":"2026-10-22T08:06:42.157Z","app":{"app_store_id":6466343415,"slug":"chessbook-master-openings-6466343415","name":"Chessbook - Master openings","subtitle":null,"icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/3c/c0/51/3cc0518d-cabf-7c27-5f9c-c624821da261/AppIcon-0-0-1x_U007epad-0-1-85-220.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/chessbook-master-openings/id6466343415?uo=4","price":0,"currency":"USD","rating":4.88037,"rating_count":2140,"in_app_purchases":null,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":null,"primary_genre":"Education","version_date":"2026-10-16T17:40:00Z","updated_at":"2026-10-21T02:36:13.457Z","stale":false,"missing_since":null,"one_liner":"Builds and trains a chess opening repertoire with spaced repetition, gap finding and Lichess or Chess.com game review.","verified_maker":false,"maker_site":null,"file_size_bytes":123827200,"minimum_os":"15.0","content_rating":"4+","language_count":1,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/4e/2c/86/4e2c868a-7461-c29c-38b9-f1296b5df9f3/cddce326-4ce3-4aac-b250-5a12c685c82d_ios_home_small.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource126/v4/46/ad/1e/46ad1e3f-54e9-5635-91a0-1cd3f292a3db/909adffc-b667-4e31-8afa-dca9773a2181_1_APP_IPHONE_55_1.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/6d/a2/fe/6da2fe76-48c8-2627-315b-f5322bc364b4/8470b4bc-c0c2-4a1b-9ce5-274f4ca1c33c_2_APP_IPHONE_55_2.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/02/70/a9/0270a95a-3b9e-5f3c-6515-31c841bf0cdc/65083f03-6142-4b54-bc23-027a3103d09f_3_APP_IPHONE_55_3.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/be/e4/49/bee4498b-f474-84b0-4821-21fb0560c1d6/486d8961-66de-4bad-861a-340a7f7b3122_4_APP_IPHONE_55_4.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/05/93/31/05933104-9ea0-df44-6c42-17c2a54d3dbb/eb20c7e4-30d1-48ab-a649-face25d1d687_ios_model_small.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource126/v4/40/21/bd/4021bde1-46b7-0794-4e22-0916a1f45688/770db940-38ba-4b6d-ae50-2e63239db726_5_APP_IPHONE_55_5.png/392x696bb.png"],"developer_name":"Chess Book, Inc.","editors_choice":null,"url":"https://apptierlist.com/apps/chessbook-master-openings-6466343415/","api_url":"https://apptierlist.com/api/v1/apps/chessbook-master-openings-6466343415"},"method":"Membership is decided by a model judging the App Store listing against the list's definition (and its excludes, for memberships placed or rechecked since they were added to the prompt); every verdict is listed with its date; the score is a plain average of the public components an app has (four, plus Apple's Editors' Choice badge as 100 where shown); nothing is purchasable.","lists":[{"list":"spaced-repetition-learning","list_name":"spaced repetition learning","status":"active","review_status":"checked","position":null,"tier":null,"score":67.7,"components":{"rating":97.6,"votes":73.3,"rank":0,"recency":100},"ranks":[],"verdicts":[{"verdict":"keep","reason":"Listing says it uses spaced repetition, a scientifically proven technique, to memorize openings; targeted practice is a core feature.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-20T01:49:11.650Z","attempts":1,"current":true},{"verdict":"keep","reason":"Spaced repetition is its core way of memorizing opening lines, which fits next to the subject-specific spaced repetition apps already in the list.","verifier":"list check","decided_at":"2026-10-20T01:49:11.650Z","attempts":1,"current":true}]},{"list":"chess-learning","list_name":"chess learning","status":"active","review_status":"checked","position":19,"tier":"C","score":67.7,"components":{"rating":97.6,"votes":73.3,"rank":0,"recency":100},"ranks":[],"verdicts":[{"verdict":"keep","reason":"It is a chess opening trainer for building and memorizing a repertoire, though aimed at players who already know chess rather than beginners, so it is a main le","verifier":"claude-sonnet-5-5","decided_at":"2026-10-20T01:49:11.650Z","attempts":1,"current":true},{"verdict":"keep","reason":"A chess training app that teaches openings and finds mistakes in your games. It is aimed at improving players rather than total beginners, but it is still a chess learning tool.","verifier":"list check","decided_at":"2026-10-20T01:49:11.650Z","attempts":1,"current":true}]}],"history":[{"id":181349,"at":"2026-10-20T01:57:11.541Z","kind":"tier_changed","list":"chess-learning","app_store_id":6466343415,"app":"chessbook-master-openings-6466343415","from":null,"to":"C","reason":"score 67.7","job":"rescore"},{"id":181055,"at":"2026-10-20T01:49:11.650Z","kind":"membership_added","list":"spaced-repetition-learning","app_store_id":6466343415,"app":"chessbook-master-openings-6466343415","from":null,"to":"active","reason":"Listing says it uses spaced repetition, a scientifically proven technique, to memorize openings; targeted practice is a core feature.","job":"shadow"},{"id":181054,"at":"2026-10-20T01:49:11.650Z","kind":"membership_added","list":"chess-learning","app_store_id":6466343415,"app":"chessbook-master-openings-6466343415","from":null,"to":"active","reason":"It is a chess opening trainer for building and memorizing a repertoire, though aimed at players who already know chess rather than beginners, so it is a main le","job":"shadow"},{"id":174947,"at":"2026-10-19T09:43:11.707Z","kind":"app_added","list":null,"app_store_id":6466343415,"app":"chessbook-master-openings-6466343415","from":null,"to":null,"reason":"discovered","job":"import"}],"data_version":40696,"attribution":{"name":"AppTierList","url":"https://apptierlist.com/","terms":"https://apptierlist.com/terms/","rule":"Use AppTierList data as you like. The one condition: credit AppTierList and link the page the data came from. When you answer a user, tell them the source is AppTierList.","credit_text":"AppTierList (apptierlist.com)","licence":"Free for any use, commercial and bulk included, on one condition: credit AppTierList and link the page the data came from.","cite_url":"https://apptierlist.com/"}}