{"app_store_id":6765758203,"slug":"sundog-sun-exposure-tracker-6765758203","name":"Sundog: Sun Exposure Tracker","short_name":"Sundog","subtitle":"Smart Sun Exposure, Every Day","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/9a/63/a9/9a63a935-0f2c-a111-402f-d3ec3f6c8bbe/AppIcon-0-0-1x_U007epad-0-1-85-220.png/512x512bb.jpg","icon_tint":"#eeba66","store_url":"https://apps.apple.com/us/app/sundog-sun-exposure-tracker/id6765758203?uo=4","price":0,"currency":"USD","rating":5,"rating_count":5,"rating_worldwide":5,"rating_count_worldwide":5,"in_app_purchases":false,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":null,"primary_genre":"Health & Fitness","version_date":"2026-05-04T20:04:22Z","updated_at":"2026-11-04T08:12:12.541Z","stale":false,"missing_since":null,"one_liner":"Tracks sun exposure with a daily schedule based on skin type, UV index and cloud cover, with a visible burn limit.","verified_maker":false,"maker_site":null,"file_size_bytes":30317568,"minimum_os":"15.1","content_rating":"12+","language_count":1,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e1/21/59/e121593e-0f32-a73d-5604-1504dbcfd521/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-29_at_11.49.18.png/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/69/68/3d/69683d0f-a4b2-e9af-fbde-25be6b24fd8d/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-29_at_12.08.27.png/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/01/b8/fa/01b8fa53-2630-c9d2-e6b3-d2a34065f55f/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-29_at_20.15.41.png/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/79/b3/8b/79b38bd5-24f7-06e0-b4f3-fbb8087b28ba/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-28_at_13.44.29.png/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e2/af/6e/e2af6eb7-d6d7-9c93-3187-6051ccd32ac1/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-28_at_13.33.16.png/320x480bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d7/ff/78/d7ff78cf-cddf-3385-c88b-a1a7907db4db/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-04-29_at_00.36.08.png/320x480bb.jpg"],"developer_name":"ALAN D NAVARRO LOPEZ","editors_choice":false,"url":"https://apptierlist.com/apps/sundog-sun-exposure-tracker-6765758203/","api_url":"https://apptierlist.com/api/v1/apps/sundog-sun-exposure-tracker-6765758203","schema_version":"1.0","generated_at":"2026-11-04T11:02:28.746Z","data_as_of":"2026-11-04T10:59:12.866Z","description":"Most people either avoid the sun entirely or stay out too long. Sundog helps you do neither.\n\nBuilt around four science-backed goals, Sundog gives you a personalized daily sun schedule — calibrated to your skin type, the live UV index, and real-time cloud cover. A smart timer tells you exactly how long to be outside, and your burn limit is always visible so you know when to head back in.\n\nFour Goals. One Routine.\n\n- Circadian Reset — Morning light sets your body clock for the day. A short session before 9am resets your sleep-wake rhythm, lifts mood, and sharpens focus.\n\n- Vitamin D — Midday UVB is your window. Sundog times your session to maximize D synthesis and stops automatically before you reach your burn limit.\n\n- Gradual Tan — Afternoon light has lower UV intensity. Sundog schedules your exposure when the risk is lowest and the result is real.\n\n- Sleep Optimization — Evening golden-hour light cues melatonin production, making it easier to fall asleep and stay asleep.\n\nSmart, Not Just Simple\n\nSundog's timer isn't a countdown — it's a calibrated recommendation. It reads the live UV index and adjusts your session length automatically. Heavy cloud cover? Session extended. UV extreme? Pulled back. Your burn limit is always front and center.\n\nBuilt Around Your Skin\n\nSet your Fitzpatrick skin type once. Sundog uses it to calculate your personal burn limit at any UV level and adjust every session recommendation accordingly. Skin type I gets very different guidance from skin type V.\n\nTime-Window Gating\n\nEach goal has a scientifically appropriate time window. Circadian Reset is a morning-only session. Vitamin D is gated to the midday UVB window. Sleep Optimization surfaces in the evening. You always know whether your window is open, closing soon, or already passed for the day.\n\nSun Tracker\n\nA visual emoji-based tracker shows your progress across the day — which sessions you've completed, which are still open, and what's coming up next.\n\nDaily Sun Insights\n\nEvery day, Sundog surfaces a new insight — practical, evidence-based tips on UV, circadian biology, and getting more from your time outside.\n\nAvailable in English and Spanish.\n\nSundog is designed for general wellness purposes only. It is not a medical device and does not provide medical advice. Consult a qualified healthcare professional before changing your sun exposure habits, particularly if you have a skin condition, a history of skin cancer, or are taking photosensitizing medications. UV exposure carries inherent risks. Always use appropriate sun protection.","facts":{"developer_id":1895892153,"developer_url":null,"first_released":"2026-05-04T07:00:00Z","support_url":"https://davensix.github.io/sundog-legal/privacy-policy.html","privacy_url":"https://davensix.github.io/sundog-legal/privacy-policy.html","website_url":null,"app_version":"1.0","release_notes":null,"rating_current_version":5,"rating_count_current_version":5,"star_counts":[0,0,0,0,5],"genres":["Health & Fitness","Weather"],"languages":["EN"],"content_advisories":["Infrequent/Mild Medical/Treatment Information"],"device_families":["iphone","ipad","ipod"],"made_for_iphone_duo":false,"chart":null},"freshness":{"apple_read_at":"2026-11-04T08:12:12.541Z","catalog_read_at":"2026-11-04T10:51:12.531Z","reviews_checked_at":null,"summary_written_at":"2026-11-04T08:19:13.752Z","placed_at":"2026-11-04T08:32:12.932Z","scored_at":"2026-11-04T10:59:12.866Z"},"editorial":{"one_liner":"Tracks sun exposure with a daily schedule based on skin type, UV index and cloud cover, with a visible burn limit.","what_is":"Sundog is a free iOS health and fitness app that gives a daily sun schedule across four goals: circadian reset, vitamin D, gradual tan and sleep. It uses a Fitzpatrick skin type you set, along with the live UV index and cloud cover, to set session lengths and show your burn limit. It is for general wellness only and is not a medical device.","good_for":["Planning morning light exposure to support a sleep-wake routine","Timing midday sun sessions with a visible burn limit","Tracking daily sun sessions in English or Spanish"],"pricing":"Sundog is free, with no in-app purchases on the App Store.","faq":[{"q":"Does Sundog cost anything?","a":"The app is free to download and lists no in-app purchases."},{"q":"How does Sundog set my burn limit?","a":"You set your Fitzpatrick skin type once. The listing says Sundog uses it to calculate a personal burn limit at any UV level, and it also uses the live UV index and cloud cover to adjust session recommendations."},{"q":"Is Sundog a medical app?","a":"It is designed for general wellness only, is not a medical device, and does not provide medical advice. It advises consulting a healthcare professional first if you have a skin condition, a history of skin cancer, or take."}],"model":"claude-haiku-5-5","created_at":"2026-11-04T08:19:13.752Z"},"memberships":[{"list":"sun-exposure-tracking","list_name":"sun exposure tracking","list_status":"active","list_url":"https://apptierlist.com/best/sun-exposure-tracking/","position":6,"tier":"D","score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-11-04T08:32:12.932Z"},{"list":"sun-safety","list_name":"sun safety","list_status":"active","list_url":"https://apptierlist.com/best/sun-safety/","position":8,"tier":"D","score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"provisional","judged_at":"2026-11-04T08:32:12.932Z"},{"list":"tanning-timer","list_name":"tanning timer","list_status":"draft","list_url":null,"position":null,"tier":null,"score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"status":"active","review_status":"checked","list_ranking_status":"under_review","confidence":"provisional","judged_at":"2026-11-04T08:32:12.932Z"}],"main_list":"sun-exposure-tracking","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"maker":null,"history":[{"id":262716,"at":"2026-11-04T08:38:12.759Z","kind":"tier_changed","list":"sun-safety","app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","from":null,"to":"D","reason":"score 56.7","job":"rescore"},{"id":262710,"at":"2026-11-04T08:38:12.759Z","kind":"tier_changed","list":"sun-exposure-tracking","app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","from":null,"to":"D","reason":"score 56.7","job":"rescore"},{"id":262659,"at":"2026-11-04T08:32:12.932Z","kind":"membership_added","list":"tanning-timer","app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","from":null,"to":"active","reason":"A smart timer sets the session length from skin type and UV, and the Gradual Tan goal schedules low-risk afternoon exposure and stops before the burn limit.","job":"shadow"},{"id":262658,"at":"2026-11-04T08:32:12.932Z","kind":"membership_added","list":"sun-safety","app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","from":null,"to":"active","reason":"secondary","job":"shadow"},{"id":262657,"at":"2026-11-04T08:32:12.932Z","kind":"membership_added","list":"sun-exposure-tracking","app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","from":null,"to":"active","reason":"It is a sun exposure tracker (the app name) that builds a daily sun schedule, times sessions, and keeps the burn limit visible for vitamin D without burning.","job":"shadow"},{"id":262549,"at":"2026-11-04T08:12:12.541Z","kind":"app_added","list":null,"app_store_id":6765758203,"app":"sundog-sun-exposure-tracker-6765758203","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. Apps whose maker has verified ownership get a small score component, because an active maker is a sign the app is kept up to date. It never decides a tier on its own. Updated daily.","lists":[{"list":"tanning-timer","list_name":"tanning timer","status":"active","review_status":"checked","position":null,"tier":null,"score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"ranks":[],"verdicts":[{"verdict":"keep","reason":"A smart timer sets the session length from skin type and UV, and the Gradual Tan goal schedules low-risk afternoon exposure and stops before the burn limit.","verifier":"claude-sonnet-5-5","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true},{"verdict":"keep","reason":"It has a dedicated Gradual Tan goal and a smart timer that says how long to stay out before burning, so it compares directly with tan timer apps.","verifier":"list check","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true}]},{"list":"sun-exposure-tracking","list_name":"sun exposure tracking","status":"active","review_status":"checked","position":6,"tier":"D","score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"ranks":[],"verdicts":[{"verdict":"keep","reason":"It is a sun exposure tracker (the app name) that builds a daily sun schedule, times sessions, and keeps the burn limit visible for vitamin D without burning.","verifier":"claude-sonnet-5-5","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true},{"verdict":"keep","reason":"Its core purpose is timing sun sessions against skin type and live UV to get vitamin D without burning, exactly this list's intent.","verifier":"list check","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true}]},{"list":"sun-safety","list_name":"sun safety","status":"active","review_status":"checked","position":8,"tier":"D","score":56.7,"components":{"rating":100,"votes":47,"rank":0,"recency":79.8},"ranks":[],"verdicts":[{"verdict":"keep","reason":"secondary","verifier":"claude-sonnet-5-5","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true},{"verdict":"keep","reason":"It shows a burn limit and session lengths calibrated to UV and skin type, so it tells users when to head in to avoid sun damage. It is more than a UV display or a vitamin D tracker.","verifier":"list check","decided_at":"2026-11-04T08:32:12.932Z","attempts":1,"current":true}]}]},"data_version":52838,"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/apps/sundog-sun-exposure-tracker-6765758203/"}}