531 Strength

Developer: Strength Lab

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19.8K installs

104 ratings

924 monthly active users

$<10K monthly revenue est.

IAP 36% · Ad 64%

Install Trends

Weekly +65

Steady

Monthly +246

Steady

531 Strength Summary

531 Strength is a ad-supported, with in-app purchases Android app in Health And Fitness by Strength Lab. Released in Jan 2022 (4 years ago). It has about 19.8K+ installs and 104 ratings with a 4.78★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 924 monthly active users and generates around $<10K monthly revenue (36% IAP / 64% ads). Store last updated Nov 23, 2025

Recent activity: 65 installs this week (246 over 4 weeks) showing steady growth View trends →

531 Strength SDKs Summary

App not yet scanned for SDKs.

App Details

Store ID: com.jachobsen.fivethreeone

First Released: 2022-01-01

Store Last Updated: 2025-11-23

App Store Category: Health & Fitness

In-App Purchases: Yes

Ads: Yes

Website: 531.jachobsen.io

App Store

Crawl Status: Success

AppGoblin First Crawled: 2025-03-13

AppGoblin Last Crawled: 2026-07-04

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-14

Ads.txt Crawl Status: Success

4.78★

Ratings: 104

5★

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1★

Screenshots

App Description

Keep focus on your lifts

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.