531 Strength icon

531 Strength

Strength Lab
Free (in-app purchases)
4.8 out of 5
10,000+ downloads

About 531 Strength

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.

531 Strength Screenshots

User Reviews

Tom Dwyer · Dec 1, 2025
★★★★★ 5
Can't recommend this app enough for anyone following the 531 program. It is well designed and incorporates excellent features without getting too busy. Moreover, the developer is responsive and investigates / addresses potential bugs. Can't ask for more than that!
Markus Servan · Nov 25, 2025
★★★★★ 5
Super quick and simple, exactly what I was looking for. Can be a bit buggy while inputting values, but I'm sure this will be fixed.
Daniel Gunby · Nov 10, 2025
★★★★★ 5
great app, works well once you get to grips with it. good tracking and perfect for basic 5/3/1
Jacob · Jun 20, 2025
★★★★★ 5
Helps me know what I o lift and really easy to figure out
George D · May 22, 2025
★★★★★ 5
awesome 👍
Neal Bakerlis · May 6, 2025
★★★★★ 5
My absolute favorite training app. I appreciate the simplicity and how organized it is. I'd pay much more than $10 for this savage app!!
Dex Baudrillard · Feb 1, 2025
★★★☆☆ 3
The calculations works fine, but sometimes the app hangs until the first ad loads.
Axe Jay · Jan 4, 2025
★★★★★ 5
No more calculator.
Brad Farris · Dec 10, 2024
★★★★★ 5
This app is so good, I literally had a nightmare that they changed it up and put ads in it. I've tried most all of the non subscription 531 apps and this is the best.
Kelly P · Dec 3, 2024
★★★★★ 5
Works like a champ!