531 Strength

531 Strength
531 Strength
Developer: Strength Lab
Category: Health & Fitness
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19.4K installs
103 ratings
1K monthly active users
$<10K monthly revenue est.
IAP 37% · Ad 63%
Install Trends
Weekly +77
Steady
Monthly +302
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 19.4K+ installs and 103 ratings with a 4.78★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 1K monthly active users and generates around $<10K monthly revenue (37% IAP / 63% ads). Store metadata: updated Nov 23, 2025.

Recent activity: 77 installs this week (302 over 4 weeks) showing below average growth , and 1.00 new ratings this week 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: 2026-05-16
Ads & App-Ads.txt
Ads.txt Last Crawled: 2025-10-14
Ads.txt Crawl Status: Success
AppGoblin SDK Scans
App not yet analyzed for SDKs.

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4.78★

Ratings: 103

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Screenshots

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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.