531 Strength

Developer: Strength Lab

Category: Health & Fitness

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19.1K installs

100 ratings

1.1K monthly active users

$<10K monthly revenue est.

IAP 51% · Ad 49%

Install Trends

Weekly +100

Steady

Monthly +1K

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 19.1K+ installs and 100 ratings with a 4.80★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 1.1K monthly active users and generates around $<10K monthly revenue (51% IAP / 49% ads). Store metadata: updated Nov 23, 2025.

Recent activity: 100 installs this week (1K over 4 weeks) showing above average growth View trends →

Store info: Last updated on Google Play on Nov 23, 2025 .

SDKs, Trackers & Permissions

App not yet scanned for SDKs.

App Details

Store ID: com.jachobsen.fivethreeone

First Released: 2022-01-01

Store Last Updated: 2025-11-23

In-App Purchases: Yes

Ads: Yes

Website: 531.jachobsen.io

App Store

Crawl Status: Success

AppGoblin First Crawled: 2025-03-13

AppGoblin Last Crawled: 2026-04-27

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-14

Ads.txt Crawl Status: Success

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App not yet analyzed for SDKs.

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4.8★

Ratings: 100

5★

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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.