Comparison

Strong Workout Tracker Gym Log vs 531 Strength

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Strong Workout Tracker Gym Log

This app helps you track your workouts and progress with an intuitive interface. It offers a wide range of exercises, detailed instructions, and advanced statistics to help you achieve your fitness goals. Easily log your routines, monitor personal records, and stay motivated on your fitness journey.

Highlights
  • Intuitive workout logging
  • Comprehensive exercise library
  • Apple Watch integration
  • Advanced progress statistics
  • Customizable routines
  • Cloud data backup
Features
Read full description

The most intuitive workout and exercise tracker for any fitness routine. Strong is the simplest and most intuitive workout tracker, designed to help you get better results from your workouts. Whether you want to gain strength or just stay healthy, join over 1.2 million people who have downloaded Strong to stay on track in the gym. “I’d suggest downloading the “Strong” app before you return to the gym. It’s that good” - CNBC “with apps like Strong, working out feels more like a game” - The Verge “I have used nearly every logging app since the App Store launched. This is the best bar none” “I use this every time I go to the gym and seriously couldn't train without it” “Simple. Intuitive. Functional. Exactly what I was looking for.” “This is bare bones and serious. Right on, and works perfectly... I wish I could give 10 stars.” “It's by far the most intuitive and easy to use workout app I’ve used.” Whether you’re a beginner or an experienced powerlifter, Strong provides everything you need to record your workouts as effortlessly and as quickly as possible. Unlike other fitness apps, Strong doesn’t bog you down with distractions and unnecessary gimmicks you’d never use. Strong is optimized for a progressive barbell routine such as Starting Strength or StrongLifts 5x5, but it is easily adaptable to any other routine of your choosing! FEATURES: • The simplest interface of any fitness app in the App Store • A comprehensive range of cardio and strength exercises - and add your own too! • Fully-featured Apple Watch app to log workouts with or without your iPhone • Add your own routines and easily choose between them • Detailed exercise instructions with a growing library of animated videos • Advanced Statistics show your personal records and progression and even calculate your one rep max and total weight lifted! • Built in Auto Countdown Timer to help record rest breaks • Support for multiple Exercise Types, including Assisted Bodyweight and Duration Exercises • Tag sets as Warm Up, Failure or Drop Sets • Supersets/Grouped Exercises • Track your progress with graphs for Volume and 1RM Progression • Automatically back up your data with Cloud Sync! • Built in body measurements tracker to record your weight and other vitals, with support for Apple Health • Warm Up Calculator tells you which weights to warm up with • Plate Calculator for when the weights get high • Support for Imperial (lbs) and Metric (kg) weights, or a combination of both • Add notes and progress pictures to your workouts • Share sheet makes sharing routines and workouts with friends easier than ever! • Export all of your data to Notes or Email in CSV format The free version of Strong can save unlimited workouts, but is limited to 3 custom routines. Upgrade to a Strong PRO subscription ($4.99/month or $29.99/year) for an unlimited number of routines and to unlock additional PRO features. Strong will automatically charge your iTunes Account at the end of your subscription or free trial period unless auto-renew is turned off at least 24 hours before the end of your current period. Subscriptions renew at the original price. You can turn off auto-renew at any time and still receive full functionality until the end of your current period, but no refund can be provided for unused portions of the subscription. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. If you’ve previously purchased “Unlock Strong” or “Strong Combo Pack”, you’ll be able to use the Restore Purchases option in the app for access to all Strong PRO features. These prices are for customers in the United States and may vary depending on your iTunes Account settings. In-app purchases and subscriptions cannot be shared using Family Sharing. Strong Terms of Service - https://help.strongapp.io/article/179-strong-terms-of-service Strong Privacy Policy - https://www.iubenda.com/privacy-policy/7760215

About

531 Strength

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.

Highlights
  • Calculate 5/3/1 weights
  • Track 1RM for exercises
  • View cycle step weights
  • Round weights to available plates
  • Full overview of weights, reps, sets
Features
Read full description

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.

Screenshots

Strong Workout Tracker Gym Log4 screens
531 Strength4 screens

Verdict

The call

The clearest difference is ads: Strong Workout Tracker Gym Log at none against 531 Strength's shown. Strong Workout Tracker Gym Log also leads on update cadence (every 2 weeks vs every 2 months) and ratings volume (108K vs 12K). 531 Strength's advantage is review sentiment (94% vs 65%). On price, rating, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Strong Workout Tracker Gym Log sells 11 in-app purchases, starting at $3.99 per month and 531 Strength sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Strong Workout Tracker Gym Log against 4.9 for 531 Strength. That said, the two scores are not equally well evidenced: Strong Workout Tracker Gym Log has 108K ratings behind it against 12K, so its average is the more settled of the two. Written reviews are what separate them: 65% of Strong Workout Tracker Gym Log's written reviews are positive against 94% of 531 Strength's.

UpkeepUpdate frequency

Strong Workout Tracker Gym Log ships an update every 2 weeks, 531 Strength every 2 months. Both last shipped on September 24, 2026.

Scorecard6 real differences · 5 level
Strong Workout Tracker Gym Log versus 531 Strength: the parameters behind the verdict, then further details
ParameterStrong Workout Tracker Gym Log531 Strength
PriceFreeFree
Rating4.9 (108K ratings)4.9 (12K ratings)
Positive reviews65.2% of reviews93.8% of reviews — better
Number of ratings108K — better12K
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#60 — better
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size129 MB28 MB
Age rating4+4+
DeveloperStrong Fitness PTE LimitedHenrik Jachobsen

Customer experience

Strong Workout Tracker Gym Log

All ratings108,483 ratings
Positive97.8%
Neutral1.0%
Negative1.3%
Written reviews1,298 reviews
Positive65.2%
Neutral10.5%
Negative24.3%

531 Strength

All ratings11,581 ratings
Positive98.0%
Neutral1.2%
Negative0.8%
Written reviews272 reviews
Positive93.8%
Neutral2.9%
Negative3.3%

User reviews

Strong Workout Tracker Gym Log

From 108K App Store ratings

What we love

  • 🚀 Excellent workout tracking
  • 👍 Clean, intuitive interface
  • 📊 Comprehensive data and progress tracking
  • ⌚ Seamless Apple Watch integration
  • 🔍 Extensive exercise library

Room to improve

  • 🔋 High battery consumption
  • 🔒 Concerns about subscription model and pricing
  • 🐛 Apple Watch app issues and syncing problems
  • 🔧 Difficulty editing or deleting exercises/routines

531 Strength

From 12K App Store ratings

What we love

  • 🚀 Simple and efficient
  • 👍 Intuitive interface
  • 💪 Helps with strength gains
  • 🔧 Customizable features
  • ⏱️ Convenient timer

Room to improve

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

Bugs and requests

Strong Workout Tracker Gym Log

Reported bugs

3 issues
  • Workouts not syncing properly between devices
  • Exercises disappearing from saved routines
  • Crashes and stability issues, especially on Apple Watch

Requested features

5 requests
  • Add ability to track body part volume and focus
  • Improve exercise search and categorization
  • Implement more advanced analytics and reporting
  • Allow pausing of workouts on Apple Watch
  • Add support for more workout types (e.g. cardio)

531 Strength

Reported bugs

2 issues
  • Rest timer stops when app is backgrounded
  • Plate calculator not flexible enough

Requested features

4 requests
  • 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

In-app purchases

11 purchases

Strong Workout Tracker Gym Log

Subscriptions6
  • Strong PRO1 Month trial$3.991 Month
  • Strong PRO (1 Month)1 Month trial2 variants$4.991 Month
  • Strong PRO (6 Months)1 Month trial$19.996 Months
Show 3 more
  • Strong PRO (1 Year)$23.991 Year
  • Strong PRO (1 Year)$29.991 Year
  • Strong PRO (1 Year)2 Months trial$29.991 Year
One-time5
  • Power Pack (Legacy)$3.99
  • Unlock Strong (Legacy)$4.99
  • Unlock + Power Pack (Legacy)$6.99
Show 2 more
  • Strong PRO Forever$79.99
  • Strong PRO Forever$99.99
4 purchases

531 Strength

One-time4
  • Additional exercises$1.99
  • Adjustable set$1.99
  • Plate calculator$1.99
Show 1 more
  • Progress log$6.99

Questions

Is Strong Workout Tracker Gym Log free?
Strong Workout Tracker Gym Log is free to download, with in-app purchases available.
Is 531 Strength free?
531 Strength is free to download, with in-app purchases available.
Which has better reviews, Strong Workout Tracker Gym Log or 531 Strength?
Strong Workout Tracker Gym Log and 531 Strength are both rated 4.9 out of 5 on the App Store, from 108K and 12K ratings respectively.
Do Strong Workout Tracker Gym Log or 531 Strength have ads?
531 Strength shows ads; Strong Workout Tracker Gym Log does not.
Which is updated more often, Strong Workout Tracker Gym Log or 531 Strength?
Strong Workout Tracker Gym Log ships an update every 2 weeks, and 531 Strength every 2 months. Most recently, Strong Workout Tracker Gym Log was updated on September 24, 2026 and 531 Strength on September 24, 2026.

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