{"app_store_id":1037710023,"slug":"nonograms-katana-1037710023","name":"Nonograms Katana","subtitle":"Sharpen your mind!","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/d3/40/cf/d340cf37-85e0-d467-ed2c-0db10c4f0471/AppIcon-0-0-1x_U007emarketing-0-6-0-85-220.jpeg/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/nonograms-katana/id1037710023?uo=4","price":0,"currency":"USD","rating":4.82917,"rating_count":6808,"in_app_purchases":true,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":"2026-10-20T14:54:12.948Z","primary_genre":"Games","version_date":"2026-07-07T05:45:45Z","updated_at":"2026-10-20T14:54:12.948Z","stale":false,"missing_since":null,"one_liner":"Picture logic puzzle game with 1001 nonograms sorted from 5x5 to 50x50, free to download, with in-app purchases.","verified_maker":false,"maker_site":null,"file_size_bytes":28289024,"minimum_os":"14.0","content_rating":"12+","language_count":15,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/16/f0/34/16f034cb-8df4-081f-a725-0ff17758e8c6/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/53/8f/eb/538feb22-73f6-2514-f185-16646de308d6/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/da/bc/43/dabc43ab-9a8a-228c-d314-7fd50acdf07f/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/d0/5b/fc/d05bfc8a-93f1-b2aa-e822-91d028d86c47/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/76/f2/bf/76f2bf18-8c73-2bca-9b6c-d28ffee79c27/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/57/1e/f7/571ef7be-2bc4-f51b-8928-4c6874bc2ce9/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/78/3a/52/783a52fd-0fdf-dd2c-8d8d-35e4b6f83b81/ss11_iOS_55.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/ee/4f/1c/ee4f1c88-d559-ac6f-fd5f-045c751a5411/pr_source.png/392x696bb.png"],"developer_name":"Ucdevs Interaction DOO","editors_choice":false,"url":"https://apptierlist.com/apps/nonograms-katana-1037710023/","api_url":"https://apptierlist.com/api/v1/apps/nonograms-katana-1037710023","schema_version":"1.0","generated_at":"2026-10-21T09:34:13.746Z","data_as_of":"2026-10-21T08:55:13.125Z","description":"Nonograms Katana: Sharpen your mind!\n\nNonograms, also known as Hanjie, Griddlers, Picross, Japanese Crosswords, Japanese Puzzles, Pic-a-Pix, \"Paint by numbers\" and other names, are picture logic puzzles in which cells in a grid must be colored or left blank according to numbers at the side of the grid to reveal a hidden picture. The numbers are a form of discrete tomography that measures how many unbroken lines of filled-in squares there are in any given row or column. For example, a clue of \"4 8 3\" would mean there are sets of four, eight, and three filled squares, in that order, with at least one blank square between successive groups.\nTo solve a puzzle, one needs to determine which cells will be boxes and which will be empty. Determining which cells are to be left empty (called spaces) is as important as determining which to fill (called boxes). Later in the solving process, the spaces help determine where a clue (continuing block of boxes and a number in the legend) may spread. Solvers usually use a dot or a cross to mark cells they are certain are spaces.\nIt is also important never to guess. Only cells that can be determined by logic should be filled. If guessing, a single error can spread over the entire field and completely ruin the solution.\n\nFeatures:\n- 1001 nonograms\n- All puzzles are free\n- All puzzles tested by computer program and have unique solution\n- Black-and-white and colored\n- Nonograms sorted by groups from 5x5 to 50x50\n- Download puzzles sent by other users\n- Create and share your own puzzles\n- 15 free hints per puzzle\n- Use crosses, dots and other symbols to mark cells\n- Auto cross out numbers\n- Auto fill trivial and completed lines\n- Auto save; if you stuck you can try another puzzle and come back later\n- Zoom and smooth scrolling\n- Lock and zoom number bars\n- Lock current puzzle state, check assumptions\n- Customize background\n- Optional cursor for accurate picking\n- Undo and redo\n- Share result pictures\n- Save game progress to the cloud\n- Achievements and leaderboards\n- Screen rotation\n- Suitable for phones and tablets\n\nVIP Features:\n- No Ads\n- View Answer\n- 5 extra hints per puzzle\n\nThe Guild Expansion:\nWelcome to the Adventurers Guild!\nBy solving puzzles, you will get loot and experience.\nYou will have weapons that allow you to deal with puzzles much faster.\nYou will be able to complete quests and receive a reward.\nYou will have to rebuild the settlement and collect the lost mosaic piece by piece.\n\nThe Dungeon Expansion:\nGame in a game in a game.\nIsometric turn-based RPG.\nWhat adventurer doesn't dream of exploring a dungeon?\n\nsite: https://nonograms-katana.com\nfacebook: https://www.facebook.com/Nonograms.Katana","facts":{"developer_id":1037710022,"developer_url":"https://nonograms-katana.com","first_released":"2015-09-15T18:24:41Z","support_url":"https://ucdevs.com/","privacy_url":"https://ucdevs.com/nonograms_katana/privacy/","website_url":"https://nonograms-katana.com/","app_version":"21.300","release_notes":"Adventurer's Guild and Dungeon expansions","rating_current_version":4.82917,"rating_count_current_version":6808,"star_counts":[56,17,121,646,5966],"genres":["Games","Puzzle"],"languages":["CS","NL","EN","FR","DE","IT","JA","KO","PL","PT","RU","ZH","ES","TR","UK"],"content_advisories":["Infrequent/Mild Profanity or Crude Humor","Infrequent/Mild Cartoon or Fantasy Violence"],"device_families":["iphone","ipad","ipod"],"chart":null},"freshness":{"apple_read_at":"2026-10-20T14:54:12.948Z","catalog_read_at":"2026-10-19T00:50:11.704Z","reviews_checked_at":"2026-10-20T14:54:12.948Z","summary_written_at":"2026-10-21T05:01:22.864Z","placed_at":"2026-10-16T15:56:02.536Z","scored_at":"2026-10-21T08:55:13.125Z"},"editorial":{"one_liner":"Picture logic puzzle game with 1001 nonograms sorted from 5x5 to 50x50, free to download, with in-app purchases.","what_is":"Nonograms Katana is a Games app for solving nonograms, also called Hanjie or Picross, where numbers on the grid edges show which cells to fill to reveal a hidden picture. It includes 1001 puzzles, all free, with black-and-white and colored options, and lets users create, share, and download puzzles. Features include hints, auto-fill of trivial lines, auto-save, cloud save progress, and achievements with leaderboards.","good_for":["Solving logic puzzles on a phone or tablet","Practicing with puzzles from 5x5 up to 50x50","Creating and sharing custom puzzles with other users"],"pricing":"Nonograms Katana is free to download, with in-app purchases on the App Store.","faq":[{"q":"Is the app free to use?","a":"The app is free to download and the listing says all puzzles are free. The App Store lists in-app purchases, and the VIP features are No Ads, View Answer, and 5 extra hints per puzzle."},{"q":"Can I make and share my own puzzles?","a":"Yes. You can create and share your own puzzles and download puzzles sent by other users."},{"q":"Does it work on tablets and save progress?","a":"It is suitable for phones and tablets, supports screen rotation, auto-saves progress, and can save game progress to the cloud."}],"model":"claude-haiku-5-5","created_at":"2026-10-21T05:01:22.864Z"},"memberships":[{"list":"nonogram-puzzles","list_name":"nonogram puzzles","list_status":"active","list_url":"https://apptierlist.com/best/nonogram-puzzles/","position":7,"tier":"S","score":92.1,"components":{"rating":96.2,"votes":80.9,"rank":98.8,"recency":92.5},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-16T15:56:02.536Z"},{"list":"logic-puzzles","list_name":"logic puzzles","list_status":"active","list_url":"https://apptierlist.com/best/logic-puzzles/","position":43,"tier":null,"score":67.4,"components":{"rating":96.2,"votes":80.9,"rank":0,"recency":92.6},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-10-16T15:56:02.536Z"},{"list":"puzzle-games","list_name":"puzzle games","list_status":"active","list_url":"https://apptierlist.com/best/puzzle-games/","position":1192,"tier":null,"score":67.4,"components":{"rating":96.2,"votes":80.9,"rank":0,"recency":92.5},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-10-16T15:56:02.536Z"}],"main_list":"nonogram-puzzles","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"history":[{"id":189096,"at":"2026-10-21T06:51:14.431Z","kind":"tier_changed","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":"D","to":null,"reason":"rank shift: #43, below the tiered top 40","job":"rescore"},{"id":185898,"at":"2026-10-20T14:54:12.948Z","kind":"tier_changed","list":"nonogram-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"S","reason":"score 66.9 to 92.1","job":"rescore"},{"id":185873,"at":"2026-10-20T14:54:12.948Z","kind":"tier_changed","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"D","reason":"rank shift: #40, score 67.4, tier full (a quarter of the list)","job":"rescore"},{"id":181316,"at":"2026-10-20T01:57:11.541Z","kind":"tier_changed","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":"C","to":null,"reason":"rank shift: #41, below the tiered top 40","job":"rescore"},{"id":133632,"at":"2026-10-16T22:15:13.437Z","kind":"tier_changed","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":"D","to":"C","reason":"rank shift: #26, score unchanged at 67","job":"rescore"},{"id":130439,"at":"2026-10-16T16:11:07.622Z","kind":"tier_changed","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"D","reason":"score 67.1","job":"rescore"},{"id":129825,"at":"2026-10-16T15:56:02.536Z","kind":"membership_added","list":"puzzle-games","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"active","reason":"placed by the category system","job":"shadow"},{"id":129824,"at":"2026-10-16T15:56:02.536Z","kind":"membership_added","list":"nonogram-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"active","reason":"Core purpose: 1001 nonograms (Hanjie, Picross) from 5x5 to 50x50, in black-and-white and color.","job":"shadow"},{"id":129823,"at":"2026-10-16T15:56:02.536Z","kind":"membership_added","list":"logic-puzzles","app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":"active","reason":"Nonograms are picture logic puzzles; the listing says to solve by logic, never guess, and each puzzle has a unique solution.","job":"shadow"},{"id":123839,"at":"2026-10-16T07:34:49.452Z","kind":"app_added","list":null,"app_store_id":1037710023,"app":"nonograms-katana-1037710023","from":null,"to":null,"reason":"discovered","job":"import"}],"explain":{"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":"nonogram-puzzles","list_name":"nonogram puzzles","status":"active","review_status":"checked","position":7,"tier":"S","score":92.1,"components":{"rating":96.2,"votes":80.9,"rank":98.8,"recency":92.5},"ranks":[{"country":"us","rank":2},{"country":"gb","rank":2},{"country":"ca","rank":2},{"country":"au","rank":3},{"country":"de","rank":2}],"verdicts":[{"verdict":"keep","reason":"Core purpose: 1001 nonograms (Hanjie, Picross) from 5x5 to 50x50, in black-and-white and color.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-16T15:56:02.536Z","attempts":1,"current":true},{"verdict":"keep","reason":"It is a dedicated nonogram app: fill cells from number clues to reveal a hidden picture.","verifier":"list check","decided_at":"2026-10-16T15:56:02.536Z","attempts":1,"current":true}]},{"list":"logic-puzzles","list_name":"logic puzzles","status":"active","review_status":"checked","position":43,"tier":null,"score":67.4,"components":{"rating":96.2,"votes":80.9,"rank":0,"recency":92.6},"ranks":[],"verdicts":[{"verdict":"keep","reason":"Nonograms are picture logic puzzles; 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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/apps/nonograms-katana-1037710023/"}}