{"app_store_id":6764710380,"slug":"coo-baby-sound-therapy-6764710380","name":"COO - Baby Sound Therapy","short_name":"COO","subtitle":"A Co-regulation Companion","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/64/54/ad/6454ad17-9b33-94ca-210a-f977fb2f5e8a/AppIcon-1x_U007epad-0-1-85-220-0.png/512x512bb.jpg","icon_tint":"#759b66","store_url":"https://apps.apple.com/us/app/coo-baby-sound-therapy/id6764710380?uo=4","price":0,"currency":"USD","rating":5,"rating_count":3,"rating_worldwide":5,"rating_count_worldwide":3,"in_app_purchases":true,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":null,"primary_genre":"Health & Fitness","version_date":"2026-09-09T16:57:55Z","updated_at":"2026-11-11T00:08:12.723Z","stale":false,"missing_since":null,"one_liner":"Sound playlists for parents and caregivers to settle a crying infant, with six sound environments and an optional sound.","verified_maker":false,"maker_site":null,"file_size_bytes":132621312,"minimum_os":"15.0","content_rating":"4+","language_count":1,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/75/ba/ef/75baef46-0467-1e79-fc92-4f9877495047/IMG_8787.PNG/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/43/7e/ea/437eea60-5ac9-7643-91a5-d174118d6064/IMG_8790.PNG/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/95/8c/91/958c919d-ea29-fb98-aa91-382d408cfbf0/IMG_8791.PNG/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/57/7d/10/577d1088-c08e-d169-706d-fd71e7f681c0/IMG_8792.PNG/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f8/d3/10/f8d310ee-37fe-f4bc-de4b-1c5a669575dc/IMG_8788.PNG/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a4/cf/b6/a4cfb608-ee5f-0643-a8c6-9dac4daa3485/IMG_8793.PNG/320x480bb.jpg"],"developer_name":"alexandra stark","editors_choice":false,"url":"https://apptierlist.com/apps/coo-baby-sound-therapy-6764710380/","api_url":"https://apptierlist.com/api/v1/apps/coo-baby-sound-therapy-6764710380","schema_version":"1.0","generated_at":"2026-11-14T17:19:49.629Z","data_as_of":"2026-11-14T15:21:12.738Z","description":"Some nights you're pacing the hallway, the backyard, the whole neighborhood with your crying infant, running out of ideas and running low on yourself.\n\nCOO was built for that moment.\n\nIt's a sound companion for parents and caregivers - layered audio designed to help you settle your baby by first settling yourself. When your nervous system regulates, your baby's follows. This is co-regulation: the science behind every instinct you already have.\n\n  Six sound environments, each designed for a specific moment:\n  - Calm & Settle - for the everyday overwhelm\n  - Big Feelings - when emotions are running high\n  - Bonding - skin to skin, fully present\n  - Immune Support - frequency support during illness\n  - Teething & Comfort - for the hard nights\n  - Sleep Wind-Down - the long, slow drift into rest\n\nEach playlist layers pink or brown noise, a binaural drone tuned to a Solfeggio frequency, a heartbeat at 68 bpm, and a soft melodic overlay, set at a comfortable default volume for each layer.\n\nCOO Premium unlocks all six playlists, the sound mixer, Play All with a drag-to-reorder queue, and extended sessions for an effortless hands-free experience. Try all of it free for 7 days, no card required, then keep it for a one-time $3.99 whenever you are ready.\n\n  Made for caregivers, by a caregiver.","facts":{"developer_id":1895888330,"developer_url":null,"first_released":"2026-05-06T07:00:00Z","support_url":"https://northstarstudios.earth/privacy","privacy_url":"https://www.northstarstudios.earth/privacy","website_url":null,"app_version":"1.0.5","release_notes":"Try COO Premium free for 7 days. All six playlists, the sound mixer, extended 15 and 30 minute sessions, and Play All with your own queue order. No card required.\n\nAlso fixed: the premium screen now recognizes you if you have already unlocked COO.","rating_current_version":5,"rating_count_current_version":3,"star_counts":[0,0,0,0,3],"genres":["Health & Fitness"],"languages":["EN"],"content_advisories":null,"device_families":["iphone","ipad","ipod"],"made_for_iphone_duo":false,"chart":null},"freshness":{"apple_read_at":"2026-11-11T00:08:12.723Z","catalog_read_at":"2026-11-05T01:46:12.664Z","reviews_checked_at":null,"summary_written_at":"2026-11-04T22:07:13.003Z","placed_at":"2026-11-05T01:38:12.750Z","scored_at":"2026-11-14T15:21:12.738Z"},"editorial":{"one_liner":"Sound playlists for parents and caregivers to settle a crying infant, with six sound environments and an optional sound.","what_is":"COO is a sound app for parents and caregivers, offering layered audio playlists meant to help settle a baby. Each playlist combines pink or brown noise, a binaural drone tuned to a Solfeggio frequency, a 68 bpm heartbeat, and a soft melodic overlay. The listing describes six sound environments, including Calm & Settle, Big Feelings, Bonding, Immune Support, Teething & Comfort, and Sleep Wind-Down.","good_for":["Settling a crying infant during evening or night hours","Calming yourself while walking or pacing with a baby","Winding down a baby toward sleep at bedtime"],"pricing":"COO is free to download, with in-app purchases on the App Store.","faq":[{"q":"Is the app free to install?","a":"It is free to download. The description says COO Premium unlocks all six playlists, the sound mixer, Play All with a drag-to-reorder queue, and extended sessions."},{"q":"Does it need a payment method to try Premium?","a":"The description says Premium can be tried free for 7 days with no card required, after which it can be kept for a one-time $3.99 payment."},{"q":"What sounds are included in each playlist?","a":"The description says each playlist layers pink or brown noise, a binaural drone tuned to a Solfeggio frequency, a heartbeat at 68 bpm, and a soft melodic overlay, at a default volume for each layer."}],"model":"claude-haiku-5-5","created_at":"2026-11-04T22:07:13.003Z"},"memberships":[{"list":"sound-therapy","list_name":"sound therapy","list_status":"active","list_url":"https://apptierlist.com/best/sound-therapy/","position":8,"tier":"A","score":80.5,"components":{"rating":100,"votes":44.8,"rank":77.9,"recency":99.6},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-11-05T01:38:12.750Z"},{"list":"relaxation-sounds","list_name":"relaxation sounds","list_status":"active","list_url":"https://apptierlist.com/best/relaxation-sounds/","position":25,"tier":"D","score":61,"components":{"rating":100,"votes":44.8,"rank":0,"recency":99.3},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-11-05T01:38:12.750Z"},{"list":"relaxation","list_name":"relaxation","list_status":"active","list_url":"https://apptierlist.com/best/relaxation/","position":92,"tier":null,"score":61,"components":{"rating":100,"votes":44.8,"rank":0,"recency":99.3},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-11-05T01:38:12.750Z"}],"main_list":"sound-therapy","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"maker":null,"history":[{"id":280529,"at":"2026-11-08T10:58:12.708Z","kind":"tier_changed","list":"sound-therapy","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":"C","to":"A","reason":"score 61.2 to 80.7","job":"rescore"},{"id":265491,"at":"2026-11-05T01:46:12.664Z","kind":"tier_changed","list":"relaxation-sounds","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":"D","reason":"score 61.2","job":"rescore"},{"id":265486,"at":"2026-11-05T01:46:12.664Z","kind":"tier_changed","list":"sound-therapy","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":"C","reason":"score 61.2","job":"rescore"},{"id":265405,"at":"2026-11-05T01:38:12.750Z","kind":"membership_added","list":"sound-therapy","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":"active","reason":"Core product is layered therapeutic audio (pink/brown noise, Solfeggio binaural drone, heartbeat) to calm baby and caregiver.","job":"shadow"},{"id":265404,"at":"2026-11-05T01:38:12.750Z","kind":"membership_added","list":"relaxation-sounds","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":"active","reason":"Playlists like Calm & Settle and Bonding play calming sound layers to relax parents and babies.","job":"shadow"},{"id":265403,"at":"2026-11-05T01:38:12.750Z","kind":"membership_added","list":"relaxation","app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":"active","reason":"placed by the category system","job":"shadow"},{"id":264651,"at":"2026-11-04T22:05:13.398Z","kind":"app_added","list":null,"app_store_id":6764710380,"app":"coo-baby-sound-therapy-6764710380","from":null,"to":null,"reason":"discovered","job":"listTurn"}],"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 an average of the components an app has (four public App Store signals, plus Apple's Editors' Choice badge as 100 where shown, plus ownership as 100 where the maker has verified it with our badge: it shows in components as ownership_verified); nothing is purchasable. 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