# 531 Strength — Keep focus on your lifts

> 5/3/1 strength training program calculator for weights, reps, and sets. (iPhone/iPad app by Henrik Jachobsen.)

- Source: https://appshunter.io/ios/app/531-strength/id1062989244 (this page in markdown: same URL + `.md`)
- Developer: [Henrik Jachobsen](https://appshunter.io/developer/497731838)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.89/5 from 11,290 App Store ratings · 239 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 28 MB
- Languages: English
- Released: 2015-12-14
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/531-strength/id1062989244/reviews.md

## What is 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.

## Key features

- Calculate 5/3/1 weights
- Track 1RM for exercises
- View cycle step weights
- Round weights to available plates
- Full overview of weights, reps, sets

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Additional exercises | $1.99 | one-time |
| Adjustable set | $1.99 | one-time |
| Progress log | $6.99 | one-time |
| Plate calculator | $1.99 | one-time |


## What do users think of 531 Strength?

Overall sentiment: positive

**Pros**

- 🚀 Simple and efficient
- 👍 Intuitive interface
- 💪 Helps with strength gains
- 🔧 Customizable features
- ⏱️ Convenient timer
- 📊 Tracking and progress logging

**Cons**

- 🔢 Inaccurate percentage calculations
- 🗓️ Lack of ability to plan future workouts
- 📋 Limited exercise tracking
- 💰 Paid features not worth the cost

**Commonly reported bugs**

- Rest timer stops when app is backgrounded
- Plate calculator not flexible enough

**Most requested features**

- Ability to adjust training max separately from 1RM
- Option to track rep PRs and estimated 1RM
- Accessory exercise tracking and planning
- Sync progress across devices

## Recent user reviews (10 of 239)

All indexed reviews: https://appshunter.io/ios/app/531-strength/id1062989244/reviews.md

### 5/5 — Perfect for 5/3/1

*2026-08-10, version 2.26*

I tried several 5/3/1 apps, and this one is the winner 👑 It’s simple, user-friendly, non-subscription-based, and can do what I need it to do.

### 5/5 — Best app for gains

*2026-08-08, version 2.26*

By far the easiest app to use without tons of distractions or ads or random features. Literally just show up and log your WOD

### 5/5 — Marie Kondo Your Workout

*2026-07-18, version 2.26*

This is the world’s simplest and most effective fitness app. If you feel your workouts have become overcomplicated and you’re not actually gaining much strength, declutter and use the app that gives me joy.

### 5/5 — Simple and Effective

*2026-07-09, version 2.26*

Been using this app for years and it has significantly helped me with my strength milestones

### 3/5 — The Content is Great!! UI needs improvement

*2026-06-29, version 2.26*

The app functions fantastic but the navigation is clunky. Swiping left and right between sets is not conducive to easily moving around different workout sets. A dropdown list of sets would be way stronger.

### 5/5 — I love it

*2026-06-23, version 2.26*

Yay

### 5/5 — My favorite fitness app

*2026-06-05, version 2.26*

Simple app with a great tracking method, calendar, graphs, and plate calculator. This has helped me get strong af

### 5/5 — Great App

*2026-04-28, version 2.26*

I’ve used this for years, my go to app for weights!

### 5/5 — Exactly what you think

*2026-04-15, version 2.26*

Short, sweet, and to the point. I wish there was an accessory lift list and accompanying rep/set tracker. But ABSOLUTELY worth the few bucks for this app. it’s a steal. Also, buy one of the 5-3-1 books and read it.

### 5/5 — OUTSTANDING

*2026-04-09, version 2.26*

Steady, objective progress. Outstanding tool.

## Frequently asked questions about 531 Strength

### 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.

## Version history (last 5 releases)

### 2.26 — 2026-01-11

Thank you for using 531 Strength!

This update includes:
- Stability fixes
- Minor UI improvements

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

### 2.25 — 2025-12-09

Thank you for using 531 Strength!

This update includes:
- Minor UI improvements

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

### 2.24 — 2025-12-06

Thank you for using 531 Strength!

This update includes:
- iOS 26 support

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

### 2.23 — 2025-07-07

Thank you for using 531 Strength!

This update includes:
- iOS 18 support

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

### 2.22 — 2022-01-02

Thank you for using 531 Strength!

This update includes:
- Minor UI improvements

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

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*