{"schema_version":"1.0","generated_at":"2026-10-23T05:04:41.534Z","app":{"app_store_id":1448661287,"slug":"guitar-tuner-guitartunio-1448661287","name":"Guitar Tuner - GuitarTunio","subtitle":null,"icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/56/7c/03/567c0384-023b-804f-8bcc-cd60fd480090/AppIcon-0-0-1x_U007emarketing-0-0-0-7-0-0-sRGB-0-0-0-GLES2_U002c0-512MB-85-220-0-0.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/guitar-tuner-guitartunio/id1448661287?uo=4","price":0,"currency":"USD","rating":4.69136,"rating_count":4361,"in_app_purchases":null,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":"2026-10-20T11:35:11.691Z","primary_genre":"Music","version_date":"2023-01-16T15:24:15Z","updated_at":"2026-10-22T09:30:17.201Z","stale":false,"missing_since":null,"one_liner":"Free guitar tuner app for stringed instruments with auto and chromatic modes, plus a metronome and chord library.","verified_maker":false,"maker_site":null,"file_size_bytes":92454912,"minimum_os":"11.0","content_rating":"4+","language_count":10,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/82/59/96/825996e2-1445-c972-cf02-adb787e9e8a0/0f08e3d6-9833-44c1-a0c0-efbc341042fa_Frame_29.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/e8/18/f2/e818f26b-4b73-e8f9-f848-0471c07259fc/b52f641f-9301-4984-9fe4-66013876315a_Frame_30.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/50/eb/91/50eb91f5-c5f3-58d0-3098-eddf86b28063/c32b15cb-51c7-48eb-af13-b6dd6321908a_Frame_31.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/df/1f/aa/df1faa90-b5ce-ffbe-4f34-9b6419c1ed0a/e158a351-f9cf-4440-a42d-145c73edc6d5_Frame_32.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/4f/a2/83/4fa2835c-b1b1-e77f-f905-6edf2753753f/7f812f6f-a74f-4341-b6de-0c687a2f254d_Frame_33.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/8c/4d/43/8c4d43fd-7832-f3c7-7bd7-9fadea261856/ae530847-f521-43f4-a6f1-d767a4ea8b84_Frame_34.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/13/4f/65/134f65d2-8b52-daac-2b10-60a4c03b6817/9de52615-5b26-4590-b0ac-5b3723981153_Frame_35.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/3d/e6/b3/3de6b3b8-fdf0-d9d2-f901-90222586197b/0699f597-b77a-41b9-be4f-90279723239e_Frame_36.jpg/392x696bb.jpg"],"developer_name":"APPS NEMO COMPANY LIMITED","editors_choice":null,"url":"https://apptierlist.com/apps/guitar-tuner-guitartunio-1448661287/","api_url":"https://apptierlist.com/api/v1/apps/guitar-tuner-guitartunio-1448661287"},"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":"guitar-tuning","list_name":"guitar tuning","status":"active","review_status":"checked","position":10,"tier":"C","score":64.7,"components":{"rating":93.2,"votes":77.6,"rank":88,"recency":0},"ranks":[{"country":"us","rank":9},{"country":"gb","rank":15},{"country":"ca","rank":12},{"country":"au","rank":12},{"country":"de","rank":17}],"verdicts":[{"verdict":"keep","reason":"The app is titled Guitar Tuner and offers 200+ guitar tunings (standard, drop, open, 7- and 12-string) with automatic tuning.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true},{"verdict":"keep","reason":"Its core purpose is tuning guitars by listening to the strings, with many guitar tunings. Its support for other instruments does not make it a general tuner alone, since guitar is its focus.","verifier":"list check","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true}]},{"list":"instrument-tuning","list_name":"instrument tuning","status":"active","review_status":"checked","position":28,"tier":"D","score":59.5,"components":{"rating":93.2,"votes":77.6,"rank":67.4,"recency":0},"ranks":[{"country":"us","rank":23},{"country":"gb","rank":28},{"country":"ca","rank":25},{"country":"au","rank":31}],"verdicts":[{"verdict":"keep","reason":"It also tunes ukulele, bass, violin family, mandolin, banjo and balalaika, so it works as a general stringed-instrument tuner.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true},{"verdict":"keep","reason":"It tunes many stringed instruments, including ukulele, bass, violin family, mandolin and banjo, so it is not a guitar-only tuner.","verifier":"list check","decided_at":"2026-10-18T05:08:11.793Z","attempts":1,"current":true}]}],"history":[{"id":163112,"at":"2026-10-18T16:46:11.995Z","kind":"tier_changed","list":"instrument-tuning","app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":"F","to":"D","reason":"score 42.7 to 59.5","job":"rescore"},{"id":155173,"at":"2026-10-18T05:20:12.091Z","kind":"tier_changed","list":"instrument-tuning","app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":null,"to":"F","reason":"score 42.7","job":"rescore"},{"id":155083,"at":"2026-10-18T05:20:12.091Z","kind":"tier_changed","list":"guitar-tuning","app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":null,"to":"C","reason":"score 64.2","job":"rescore"},{"id":154780,"at":"2026-10-18T05:08:11.793Z","kind":"membership_added","list":"instrument-tuning","app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":null,"to":"active","reason":"It also tunes ukulele, bass, violin family, mandolin, banjo and balalaika, so it works as a general stringed-instrument tuner.","job":"shadow"},{"id":154779,"at":"2026-10-18T05:08:11.793Z","kind":"membership_added","list":"guitar-tuning","app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":null,"to":"active","reason":"The app is titled Guitar Tuner and offers 200+ guitar tunings (standard, drop, open, 7- and 12-string) with automatic tuning.","job":"shadow"},{"id":146770,"at":"2026-10-17T11:32:13.408Z","kind":"app_added","list":null,"app_store_id":1448661287,"app":"guitar-tuner-guitartunio-1448661287","from":null,"to":null,"reason":"discovered","job":"import"}],"data_version":41516,"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/"}}