{"app_store_id":1062989244,"slug":"531-strength-1062989244","name":"531 Strength","subtitle":"Keep focus on your lifts","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/cf/ab/d1/cfabd111-a267-bd59-69d2-04ea4ede48f6/AppIcon-0-0-1x_U007emarketing-0-7-0-85-220.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/531-strength/id1062989244?uo=4","price":0,"currency":"USD","rating":4.88313,"rating_count":11645,"in_app_purchases":true,"recent_rating":4.67,"recent_review_count":18,"reviews_checked_at":"2026-10-18T10:34:11.689Z","primary_genre":"Health & Fitness","version_date":"2026-10-16T14:04:22Z","updated_at":"2026-10-20T00:39:11.537Z","stale":false,"missing_since":null,"one_liner":"Calculates 5/3/1 weights, reps and sets from saved one-rep maxes, rounded to the plates you have.","verified_maker":false,"maker_site":null,"file_size_bytes":27001856,"minimum_os":"18.0","content_rating":"4+","language_count":1,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/23/8c/d9/238cd997-aa03-0bcd-f487-ee401f46e971/pr_source.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/80/52/ee/8052ee4b-2d20-9ce1-fecc-30e614d6ee60/pr_source.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/5f/1b/6c/5f1b6cf1-de41-150f-39ee-044157397bb7/pr_source.jpg/392x696bb.jpg","https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/83/89/45/8389450f-1436-0a64-ce07-641427470908/pr_source.jpg/392x696bb.jpg"],"developer_name":"Henrik Jachobsen","editors_choice":false,"url":"https://apptierlist.com/apps/531-strength-1062989244/","api_url":"https://apptierlist.com/api/v1/apps/531-strength-1062989244","schema_version":"1.0","generated_at":"2026-10-20T19:07:45.836Z","data_as_of":"2026-10-20T18:30:14.630Z","description":"Makes it quick and easy to get a full overview of all weights, reps and sets based off your 1RM when you’re following the 5/3/1 program.\n\n- Save your current 1 RM for each of the four exercises\n\n- View calculated weights for each step in the cycle\n\n- Round the weight to match the plates you have available\n\nThis app is made for people who are familiar with the structure of the 5/3/1 program and who needs simple access to the calculated weights for each exercise.","facts":{"developer_id":497731838,"developer_url":"https://531.jachobsen.io","first_released":"2015-12-14T19:42:47Z","support_url":"https://531.jachobsen.io/feedback","privacy_url":"https://531.jachobsen.io/privacy/","website_url":"https://531.jachobsen.io/","app_version":"2.27","release_notes":"Thank you for using 531 Strength!\n\nThis update includes:\n- Redesigned Settings\n- Purchases come back automatically when you reinstall or change device\n- Improved error handling of iCloud backups\n- Improved CSV exports\n- Fixed minor issue with rounding\n- Requires iOS 18 or later\n\nIf you enjoy the app, please support the further development of the app by making an in-app purchase.","rating_current_version":4.88313,"rating_count_current_version":11645,"star_counts":[64,33,135,737,10675],"genres":["Health & Fitness","Lifestyle"],"languages":["EN"],"content_advisories":null,"device_families":["iphone","ipad"],"chart":null},"freshness":{"apple_read_at":"2026-10-20T00:39:11.537Z","catalog_read_at":"2026-10-17T01:42:13.389Z","reviews_checked_at":"2026-10-18T10:34:11.689Z","summary_written_at":"2026-10-16T07:13:49.451Z","placed_at":"2026-10-15T06:24:53.111Z","scored_at":"2026-10-20T18:30:14.630Z"},"editorial":{"one_liner":"Calculates 5/3/1 weights, reps and sets from saved one-rep maxes, rounded to the plates you have.","what_is":"531 Strength is a Health & Fitness app for the 5/3/1 training program. It stores your current 1RM for each of the four exercises and shows the calculated weights for each step in the cycle. Weights can be rounded to match the plates you have available.","good_for":["Lifters already familiar with the 5/3/1 program structure","Quick access to calculated weights for each exercise","Rounding loads to the plates you have available"],"pricing":"531 Strength is free to download, with in-app purchases on the App Store.","faq":[{"q":"Who is the app made for?","a":"It is made for people who are familiar with the structure of the 5/3/1 program and who need simple access to calculated weights for each exercise."},{"q":"How many exercises can I save a 1RM for?","a":"You can save your current 1 RM for each of the four exercises."},{"q":"Does the app cost anything?","a":"It is free to download."}],"model":"claude-haiku-5-5","created_at":"2026-10-16T07:13:49.451Z"},"memberships":[{"list":"strength-training","list_name":"strength training","list_status":"active","list_url":"https://apptierlist.com/best/strength-training/","position":29,"tier":"B","score":82.7,"components":{"rating":97.6,"votes":81.3,"rank":51.8,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-15T06:24:53.111Z"}],"main_list":"strength-training","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"history":[{"id":163668,"at":"2026-10-18T23:42:11.603Z","kind":"tier_changed","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":"A","to":"B","reason":"rank shift: #28, score unchanged at 82.7, tier full (a quarter of the list)","job":"rescore"},{"id":136348,"at":"2026-10-17T02:04:13.384Z","kind":"tier_changed","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":"B","to":"A","reason":"score 73.8 to 82.7","job":"rescore"},{"id":135650,"at":"2026-10-17T01:33:13.388Z","kind":"tier_changed","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":null,"to":"B","reason":"score 60.6 to 73.8","job":"rescore"},{"id":102822,"at":"2026-10-15T10:28:36.039Z","kind":"tier_changed","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":"D","to":null,"reason":"rank shift: #42, below the tiered top 40","job":"rescore"},{"id":96369,"at":"2026-10-15T06:43:53.122Z","kind":"tier_changed","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":null,"to":"D","reason":"score 60.7","job":"rescore"},{"id":94911,"at":"2026-10-15T06:24:53.111Z","kind":"membership_added","list":"strength-training","app_store_id":1062989244,"app":"531-strength-1062989244","from":null,"to":"active","reason":"It is built around the 5/3/1 strength program and gives the calculated weights, reps and sets for each step in the cycle.","job":"shadow"},{"id":91854,"at":"2026-10-15T02:50:53.117Z","kind":"app_added","list":null,"app_store_id":1062989244,"app":"531-strength-1062989244","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); 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":"strength-training","list_name":"strength training","status":"active","review_status":"checked","position":29,"tier":"B","score":82.7,"components":{"rating":97.6,"votes":81.3,"rank":51.8,"recency":100},"ranks":[{"country":"gb","rank":38},{"country":"us","rank":39},{"country":"ca","rank":47}],"verdicts":[{"verdict":"keep","reason":"It is built around the 5/3/1 strength program and gives the calculated weights, reps and sets for each step in the cycle.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-15T06:24:53.111Z","attempts":1,"current":true},{"verdict":"keep","reason":"approved from the list's side","verifier":"list check","decided_at":"2026-10-15T06:24:53.111Z","attempts":1,"current":true}]}]},"data_version":39152,"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/531-strength-1062989244/"}}