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.

What’s New

Version 2.12

Thank you for using 531 Strength!

Rest timer:
- Rest timer notifications got an action to restart the timer directly from the notification
- Added setting to enable having the timer automatically show when marking a set as done

Progress log:
- Log entry date and week is now editable
- Last set reps are included in the calendar overview when choosing list mode

- Added 75% option to TM percentages
- Minor changes to the design

If you enjoy the app, please support the further development of the app by making an in-app purchase.

Ratings and Reviews

4.9 out of 5
5K Ratings

5K Ratings

Shadowlesson ,

Simple, solid, useful.

The criticism I have to offer is that the app doesn't have a feature which generates which weight plates to use. I've used apps in the past that automatically displayed which weights you needed on the bar for each set like a 45, a 10, a 5, a 2.5 and a 1.25. Barbell math is easy enough but it's nice to just slap on what it tells you to during warmup sets. The only other thing I have is that the rest timer does not continue counting down if you leave the app, so if you check a Facebook notification during a 3 minute rest or leave the app to check that text you got during your last set, your rest timer is jacked. Fix those two things and the app would be nearly perfect.

10/10 would download again. lol.

tbeezer12 ,

Incredibly functional app for 5/3/1

First time making a review because this app deserves 5 stars. I even bought the in app purchases just for extra convenience and to help the developer. I was using spreadsheets and print outs for a year for 5/3/1 and this app eliminated that. The ability to track all of your lifts over time with the calendar is by far the best feature. It’s great to easily look back at all of my lifts and notes for each day and to track my estimated 1RM in the graphs. Only thing I wish this app had was a way to keep track of what cycle you’re on and what 1RM you’ve used in past cycles so you don’t accidentally set the wrong one. Besides that this app is basically perfect.

Numbski ,

Easily gets 5 stars, does absolutely everything.

This app is at its best when you buy the IAPs. It does everything you could want in a 5/3/1 app. My only gripe, which is super-minor is that the ability to re-order the days you do which lifts is bundled with the ability to track additional exercises, and that isn’t immediately obvious. I didn’t bother with that IAP because I am only tracking the big four, only to find that the one feature I wanted was already available and I didn’t know it.


Henrik Jachobsen
28.8 MB
Health & Fitness

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2019 Jachobsen
In-App Purchases
  1. Additional exercises $1.99
  2. Adjustable set $1.99
  3. Progress log $5.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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