531 Strength

Developer: Henrik Jachobsen

Category: Health & Fitness

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628.7K installs

12.6K ratings

46.9K monthly active users

$<10K monthly revenue est.

IAP 23% · Ad 77%

Install Trends

Weekly +250

Declining

Monthly +1.2K

Declining

531 Strength Summary

531 Strength is a ad-supported, with in-app purchases iOS app in Health And Fitness by Henrik Jachobsen. Released in Dec 2015 (10 years ago). It has 12.6K ratings with a 4.88★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 46.9K monthly active users and generates around $<10K monthly revenue (23% IAP / 77% ads). Store metadata: updated Jan 11, 2026.

Recent activity: 6.00 new ratings this week View trends →

Store info: Last updated on App Store on Jan 11, 2026 .

SDKs, Trackers & Permissions

App not yet scanned for SDKs.

App Details

Store ID: 1062989244

First Released: 2015-12-14

Store Last Updated: 2026-01-11

In-App Purchases: Yes

Ads: Yes

Website: 531.jachobsen.io

App Store

Crawl Status: Success

AppGoblin First Crawled: 2025-02-09

AppGoblin Last Crawled: 2026-04-27

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-14

Ads.txt Crawl Status: Success

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4.88★

Ratings: 12.6K

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Screenshots

App 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.

- Save your current 1 RM for each of the four exercises

- View calculated weights for each step in the cycle

- Round the weight to match the plates you have available

This 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.