{"app_store_id":957586938,"slug":"intervals-pro-hiit-timer-957586938","name":"Intervals Pro: HIIT Timer","subtitle":"Running & Fitness Workouts","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/6a/fd/1d/6afd1dbe-7d37-fb35-dd8f-8b657b83903e/AppIcon-0-0-1x_U007emarketing-0-0-0-11-0-0-85-220.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/intervals-pro-hiit-timer/id957586938?uo=4","price":0,"currency":"USD","rating":4.77017,"rating_count":13693,"in_app_purchases":true,"recent_rating":4.4,"recent_review_count":20,"reviews_checked_at":"2026-10-15T19:53:00.406Z","primary_genre":"Health & Fitness","version_date":"2026-09-17T11:53:04Z","updated_at":"2026-10-19T20:50:11.591Z","stale":false,"missing_since":null,"one_liner":"Interval timer app for iPhone, Apple Watch and iPad with time-based, distance-based and count-up intervals.","verified_maker":false,"maker_site":null,"file_size_bytes":71892992,"minimum_os":"17.5","content_rating":"4+","language_count":11,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/77/b8/31/77b8317d-42bd-b895-2438-d6c437f8088f/a310f0b3-8398-4e87-b907-3fe86aac3cc3_iPhone_8_Hero_1.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/61/22/ce/6122ceba-2b49-736e-95e3-5f665bb17fb4/bd667946-bf1d-443c-a259-00511506edde_iPhone_8_Hero_2.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/80/89/2a/80892a8b-9cbd-5f80-3ec2-6d3740f08834/e66ab9f6-1347-40d9-8add-ed0e713a510e_iPhone_8_Share.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/56/86/55/56865544-67ad-e714-3d88-398c36eeb0f5/1900ff24-97fc-4f94-9dc6-a5a8ffd4fa18_iPhone_8_Timer_Types.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/f6/bd/30/f6bd3074-2ae5-139d-7498-2a295229ab81/32d302d6-32d6-41ab-898c-916dfcb88e55_iPhone_8_Timer_Templates.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/00/0f/1f/000f1f0f-838e-b6f4-043b-75f898fb01c5/c923ca66-c7ad-4e42-88e0-93d73903dc90_iPhone_8_Customize.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/e4/37/a2/e437a2f7-54f5-f4c4-7ecd-8d54b3e52636/fc9a930d-4630-4216-a66f-912b5fb938c4_iPhone_8_Close_Rings.png/392x696bb.png","https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/04/36/ea/0436ea58-8fd4-90fb-72d0-66a0f1f7907c/8b979ed1-91f3-47d1-97bb-17b5333009da_iPhone_8_Analyze_Interval.png/392x696bb.png"],"developer_name":"Intervals, LLC","editors_choice":false,"url":"https://apptierlist.com/apps/intervals-pro-hiit-timer-957586938/","api_url":"https://apptierlist.com/api/v1/apps/intervals-pro-hiit-timer-957586938","schema_version":"1.0","generated_at":"2026-10-20T04:40:53.748Z","data_as_of":"2026-10-20T04:13:11.692Z","description":"Custom Interval Training at its best for iPhone, Apple Watch and iPad. Featured by Apple and recommended by fitness instructors, personal trainers, marathon runners, and coaches.\n\nLet Intervals Pro guide you through any type of interval workout: HIIT, running, strength training, yoga, stretching, circuit training, boxing, MMA, elliptical, rehabilitation, meditation, 7-minute workouts, and many more.\n\nFEATURED BY\n• Apple - App of the Day in 132 Countries\n• Apple - Workout with Apple Watch, Quick HIIT Workouts\n• Women's Health Magazine\n• COACH Magazine\n• SixColors.com\n\nHIGHLIGHTS\n• Highly Customizable\n• Home Screen Widgets to quickly launch timers\n• Spoken interval names and prompts\n• Customizable alert sounds\n• Standalone Apple Watch workouts. Leave your iPhone at home!\n• Workout History using Apple Health data\n• View an Apple Watch workout live on your iPhone!\n• Run in the background with the screen locked\n• Play music or podcasts using the app of your choice\n• Bluetooth heart rate monitor support for Apple Watch or iPhone\n• Fill your Activity Rings\n• Siri Shortcuts\n• Share timers with friends\n• Time and Distance Goals\n• Running Pace and Heart Rate Targets\n• Auto pause and resume\n• Send completed workouts to Strava\n• Confetti!\n\nPERSONALIZE YOUR WORKOUT\n• Customize the Name, Duration, Alert, and Color for each interval\n• Customize Alert Sounds and Voice Prompts to guide you through your workout\n• Set a Countdown Alert and vibrations when the interval is about to end\n• Optional halfway alert\n• Set target heart rate ranges for each interval\n• Set time and distance goals\n\nFLEXIBLE INTERVAL DURATIONS\n• Time based (e.g., 45 seconds)\n• Distance-based (e.g., 0.5 MI or KM)\n• Count up intervals keep running until your ready for the next interval\n• Estimated time or distance. Count down time or distance to zero and then continue the interval, counting up until you're ready to move on.\n\nTHE BEST APPLE WATCH INTERVAL TIMER\n• Leave your phone at home with our standalone Apple Watch app\n• Control your music or podcasts on the \"Now Playing\" screen\n• View an Apple Watch workout live on your iPhone\n• Alert Sounds and Voice Prompts to guide you through your workout\n• Configurable haptic alert countdown that taps you on the wrist when the interval is ending\n• Track heart rate, calories, distance, and pace\n• Route tracking for running, walking, and cycling\n• Workouts contribute to the Apple Watch Activity Rings\n\nWORKOUT HISTORY USING APPLE HEALTH\n• Intervals Pro has the best Apple Health integration of any interval training app\n• Track heart rate, calories, distance, and pace\n• Route tracking for running, walking, and cycling\n• Detailed stats for every interval\n• All your data is safely stored in Apple Health\n\nGREAT FOR RUNNING AND CYCLING\n• Interval duration can be set to either a specified time or distance\n• Display current pace, pace for the interval, or pace for the entire run\n• Configure heart rate ranges per interval\n• Analyze each interval of your run in the workout history\n\nMULTIPLE VOICES AND LANGUAGES\n• Select the language and voice to use for all spoken alerts.\n• Spoken alerts are localized to 10 languages. Chinese (simplified), Danish, Dutch, French, German, Italian, Norwegian, Polish, Spanish, and Swedish.\n\nGet Intervals Pro today, and your workouts will never be the same!\n\nSUBSCRIPTION INFO\n\nIntervals Pro is free to download and has a free timer. To create multiple timers and unlock all the features of the app, you may choose between a monthly or yearly auto-renewing subscription option.\n\nUpon confirmation of the purchase, payment will be charged to your credit card through your iTunes account. Subscription renews automatically unless canceled at least 24 hours before the end of the subscription period.\n\nSubscriptions can be managed and auto-renewal turned off in Account Settings in the App Store app.\n\nPrivacy Policy and Terms of Service: https://intervalspro.com/privacy-policy.html","facts":{"developer_id":331071662,"developer_url":"https://www.intervalspro.com","first_released":"2015-02-18T04:48:13Z","support_url":"https://www.intervalspro.com/","privacy_url":"https://intervalspro.com/privacy-policy.html","website_url":"https://www.intervalspro.com/","app_version":"2026.9","release_notes":"Adjust Your Timer Mid-Workout! Other fixes and improvements for a smoother workout experience.","rating_current_version":4.77017,"rating_count_current_version":13693,"star_counts":[336,96,230,1055,11976],"genres":["Health & Fitness","Utilities"],"languages":["DA","NL","EN","FR","DE","IT","NB","PL","ZH","ES","SV"],"content_advisories":null,"device_families":["watch","iphone","ipad"],"chart":null},"freshness":{"apple_read_at":"2026-10-19T20:50:11.591Z","catalog_read_at":"2026-10-19T20:50:11.591Z","reviews_checked_at":"2026-10-15T19:53:00.406Z","summary_written_at":"2026-10-17T21:16:11.614Z","placed_at":"2026-10-15T06:00:53.131Z","scored_at":"2026-10-20T04:13:11.692Z"},"editorial":{"one_liner":"Interval timer app for iPhone, Apple Watch and iPad with time-based, distance-based and count-up intervals.","what_is":"Intervals Pro is a custom interval timer for iPhone, Apple Watch and iPad, listed under Health & Fitness. It guides workouts such as HIIT, running, strength training, yoga, circuit training and boxing. Intervals can be set by time or distance, with alert sounds, voice prompts and workout history stored in Apple Health.","good_for":["Building custom HIIT or circuit workouts with timed intervals","Running or cycling sessions with distance or pace targets","Apple Watch workouts without carrying the iPhone"],"pricing":"Intervals Pro: HIIT Timer is free to download, with in-app purchases on the App Store.","faq":[{"q":"Is the app free?","a":"It is free to download."},{"q":"Can I use it with only an Apple Watch?","a":"The listing describes standalone Apple Watch workouts, with a note that you can leave your iPhone at home. It also says you can view an Apple Watch workout live on your iPhone."},{"q":"How does it use Apple Health?","a":"The listing says workout history uses Apple Health data, tracks heart rate, calories, distance and pace, and that all data is stored in Apple Health."}],"model":"claude-haiku-5-5","created_at":"2026-10-17T21:16:11.614Z"},"memberships":[{"list":"interval-training","list_name":"interval training","list_status":"active","list_url":"https://apptierlist.com/best/interval-training/","position":1,"tier":"S","score":93.7,"components":{"rating":95.2,"votes":82.8,"rank":96.6,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-15T06:00:53.131Z"},{"list":"hiit-timer","list_name":"hiit timer","list_status":"active","list_url":"https://apptierlist.com/best/hiit-timer/","position":3,"tier":"S","score":94,"components":{"rating":95.2,"votes":82.8,"rank":97.8,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-15T06:00:53.131Z"},{"list":"workout-timer","list_name":"workout timer","list_status":"draft","list_url":null,"position":null,"tier":null,"score":69.5,"components":{"rating":95.2,"votes":82.8,"rank":0,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"under_review","confidence":"provisional","judged_at":"2026-10-15T06:00:53.131Z"},{"list":"interval-timer","list_name":"interval timer","list_status":"active","list_url":"https://apptierlist.com/best/interval-timer/","position":8,"tier":"A","score":92.2,"components":{"rating":95.2,"votes":82.8,"rank":90.6,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-15T06:00:53.131Z"}],"main_list":"interval-training","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"history":[{"id":147920,"at":"2026-10-17T18:08:13.443Z","kind":"tier_changed","list":"interval-training","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"S","reason":"score 69.5 to 93.7","job":"rescore"},{"id":147051,"at":"2026-10-17T13:15:14.012Z","kind":"tier_changed","list":"hiit-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"S","reason":"score 69.5 to 94","job":"rescore"},{"id":138078,"at":"2026-10-17T03:06:13.388Z","kind":"tier_changed","list":"interval-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":"S","to":"A","reason":"rank shift: #8, score unchanged at 92.2, tier full (a quarter of the list)","job":"rescore"},{"id":133368,"at":"2026-10-16T20:26:40.462Z","kind":"tier_changed","list":"interval-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":"A","to":"S","reason":"score 88.2 to 92.2","job":"rescore"},{"id":94242,"at":"2026-10-15T06:12:53.109Z","kind":"tier_changed","list":"interval-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"A","reason":"score 88.2","job":"rescore"},{"id":93238,"at":"2026-10-15T06:00:53.131Z","kind":"membership_added","list":"workout-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"active","reason":"Times workouts of many types (strength, yoga, boxing, circuits) with work and rest rounds, including standalone Apple Watch use.","job":"shadow"},{"id":93237,"at":"2026-10-15T06:00:53.131Z","kind":"membership_added","list":"interval-training","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"active","reason":"Described as 'Custom Interval Training at its best' and guides users through interval workouts with spoken prompts and alerts on when to switch.","job":"shadow"},{"id":93236,"at":"2026-10-15T06:00:53.131Z","kind":"membership_added","list":"interval-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"active","reason":"Core job is custom interval timers with per-interval names, durations, alerts and colors, on iPhone and Apple Watch.","job":"shadow"},{"id":93235,"at":"2026-10-15T06:00:53.131Z","kind":"membership_added","list":"hiit-timer","app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","from":null,"to":"active","reason":"The app is named 'HIIT Timer' and is built to run timed work and rest intervals for HIIT workouts.","job":"shadow"},{"id":87208,"at":"2026-10-14T19:33:33.748Z","kind":"app_added","list":null,"app_store_id":957586938,"app":"intervals-pro-hiit-timer-957586938","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); 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