531 Strength

531 Strength

Keep focus on your lifts

12K ratings
282 reviews
Free
In-App PurchasesWith Ads

Details

Released
December 14, 2015
Updated
October 16, 2026

Features

531 Strength screenshot #1 for iPhone
531 Strength screenshot #2 for iPhone
531 Strength screenshot #3 for iPhone
531 Strength screenshot #4 for iPhone
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About

This app simplifies tracking your progress on the 5/3/1 strength training program. It calculates and displays weights, reps, and sets based on your one-rep max, allowing you to easily plan and execute your workouts. Rounding options help match available gym plates.

βœ“Calculate 5/3/1 weights
βœ“Track 1RM for exercises
βœ“View cycle step weights
βœ“Round weights to available plates
βœ“Full overview of weights, reps, sets
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What users say about 531 Strength

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What's New in 531 Strength

2.27

October 16, 2026

Thank you for using 531 Strength! This update includes: - Redesigned Settings - Purchases come back automatically when you reinstall or change device - Improved error handling of iCloud backups - Improved CSV exports - Fixed minor issue with rounding - Requires iOS 18 or later If you enjoy the app, please support the further development of the app by making an in-app purchase.

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4

Subscriptions & In-App Purchases

$1.99

Additional exercises

Keep track of more than the four big lifts

User reviews

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Good app. Sick of Apple making me review this over and over.

Love This 531 App!!

Thank you for making this app so easy to use and so affordable! I love it! So simple! I purchased the additional exercise feature to add Barbell Curl to 531, and this made the app perfect for my training program!

My review

This is easier than the way I’d write out my workouts! And I use to powerlift in special Olympics and our coach did this same format. I wondered how to do it and wasn’t sure on how to do or where to find a book!? I found the app and put it on my phone and I totally dig it!!

Fantastic and simple

I’ve definitely tried many of the 531 apps out there and while I love all the features of some of them. Others are just terrible, this app however, is exactly what I need where I am in my lifting these days. Got lots of other activities in my life don’t need an app that tracks 1000 different lifts. Just stick with the 531 main lifts and progressions allows me to work out in other ways.
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Perfect-Simple to Use

This app makes calculating your weights so easy. They only charge a one time fee, not a subscription. It’s simple so you’re not sitting on your phone for 20 minutes after every set logging it.

User experience

🐞

Reported Bugs

2 issues

Rest timer stops when app is backgrounded

Bug

Plate calculator not flexible enough

Bug
✨

Requested Features

4 requests

Ability to adjust training max separately from 1RM

Feature

Option to track rep PRs and estimated 1RM

Feature

Accessory exercise tracking and planning

Feature

Sync progress across devices

Feature

FAQ

What does the 531 Strength app do?

This app helps you follow the 5/3/1 strength training program by calculating the necessary weights, reps, and sets for each exercise based on your one-rep max (1RM). It provides a clear overview of your workout progression throughout the training cycle.

How does the app calculate weights?

You input your current 1RM for each of the four main exercises. The app then uses this information to calculate the precise weights you should be lifting for each step of the 5/3/1 cycle. It also offers an option to round these calculated weights to match the plates you have available at the gym.

Is this app free to use?

The application is free to download and use, but it does offer in-app purchases. This means some features or content may require a one-time purchase to unlock.

Who is the 531 Strength app designed for?

This app is specifically created for individuals who are already familiar with the structure and principles of the 5/3/1 strength training program. It's ideal for those who need simple and quick access to their calculated workout weights without complex interfaces.

What are the key features of the 531 Strength app?

Key features include the ability to save your current 1RM for each exercise, view calculated weights for every step in the 5/3/1 cycle, and round weights to match the plates you have available. It provides a comprehensive overview of your weights, reps, and sets.