{"schema_version":"1.0","generated_at":"2026-10-21T18:12:38.207Z","app":{"app_store_id":1420774597,"slug":"nautical-charts-maps-1420774597","name":"Nautical Charts & Maps","subtitle":null,"icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/f0/85/c2/f085c29f-f9c1-9ea9-9d1c-e3e500731c5d/AppIcon-0-0-1x_U007emarketing-0-8-0-sRGB-85-220.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/nautical-charts-maps/id1420774597?uo=4","price":8.99,"currency":"USD","rating":4.62299,"rating_count":3793,"in_app_purchases":null,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":null,"primary_genre":"Navigation","version_date":"2026-07-29T21:14:05Z","updated_at":"2026-10-21T09:40:13.337Z","stale":false,"missing_since":null,"one_liner":"Displays NOAA electronic navigational charts and NOAA weather map overlays for marine use, with charts available for.","verified_maker":false,"maker_site":null,"file_size_bytes":15026176,"minimum_os":"14.0","content_rating":"12+","language_count":3,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/af/ad/2f/afad2f99-9e4f-e4be-b0f3-503a855e1c23/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/e5/15/52/e5155264-f5ea-cf98-987c-62348c427da1/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/1a/36/79/1a36796e-04a7-448d-d820-fba198d9b310/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/c9/90/8c/c9908c55-c7d6-b95d-8865-11a43e62f989/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/ee/73/3d/ee733d2c-85b6-7aec-1ae0-f4bd5ac1f20c/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/08/d2/4f/08d24f00-57de-e8b0-8139-c29a6ac1b3ea/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/49/39/ed/4939edf2-83e5-7dad-be0c-c653ab747e2b/pr_source.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/87/4d/b8/874db88e-97e6-aa67-41f2-fb5aced98553/pr_source.png/392x696bb.png"],"developer_name":"LW Brands, LLC","editors_choice":null,"url":"https://apptierlist.com/apps/nautical-charts-maps-1420774597/","api_url":"https://apptierlist.com/api/v1/apps/nautical-charts-maps-1420774597"},"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":"boat-navigation","list_name":"boat navigation","status":"active","review_status":"checked","position":12,"tier":"A","score":79.2,"components":{"rating":92.3,"votes":75.8,"rank":52.4,"recency":96.2},"ranks":[{"country":"us","rank":21},{"country":"ca","rank":39}],"verdicts":[{"verdict":"keep","reason":"Core feature is NOAA electronic navigational charts for marine navigation, downloadable offline, showing buoys, depths, routes.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true},{"verdict":"keep","reason":"A marine charting app with offline NOAA ENC charts showing buoys, depths and hazards. It is the same kind of tool as the other boating chart apps in this list.","verifier":"list check","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true}]},{"list":"weather-maps","list_name":"weather maps","status":"active","review_status":"checked","position":27,"tier":"C","score":66.1,"components":{"rating":92.3,"votes":75.8,"rank":0,"recency":96.2},"ranks":[],"verdicts":[{"verdict":"keep","reason":"Headline feature is NOAA weather map overlays: sea surface temperature, waves, wind, rain probability, lightning, air temperature.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true},{"verdict":"keep","reason":"Multi-layer NOAA weather overlays (radar, wind, waves, sea temperature, lightning, rain) are named as one of the app's two main features. This is comparable to marine weather map apps like PredictWind.","verifier":"list check","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true}]}],"history":[{"id":169307,"at":"2026-10-19T05:08:11.787Z","kind":"tier_changed","list":"boat-navigation","app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":"C","to":"A","reason":"score 66.2 to 80.1","job":"rescore"},{"id":155097,"at":"2026-10-18T05:20:12.091Z","kind":"tier_changed","list":"weather-maps","app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":null,"to":"C","reason":"score 66.3","job":"rescore"},{"id":155078,"at":"2026-10-18T05:20:12.091Z","kind":"tier_changed","list":"boat-navigation","app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":null,"to":"C","reason":"score 66.3","job":"rescore"},{"id":154767,"at":"2026-10-18T05:08:11.793Z","kind":"membership_added","list":"weather-maps","app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":null,"to":"active","reason":"Headline feature is NOAA weather map overlays: sea surface temperature, waves, wind, rain probability, lightning, air temperature.","job":"shadow"},{"id":154766,"at":"2026-10-18T05:08:11.793Z","kind":"membership_added","list":"boat-navigation","app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":null,"to":"active","reason":"Core feature is NOAA electronic navigational charts for marine navigation, downloadable offline, showing buoys, depths, routes.","job":"shadow"},{"id":153851,"at":"2026-10-18T04:38:11.715Z","kind":"app_added","list":null,"app_store_id":1420774597,"app":"nautical-charts-maps-1420774597","from":null,"to":null,"reason":"discovered","job":"import"}],"data_version":40163,"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/"}}