Comparison

531 Strength vs Liftosaur

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

Head to head
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.

About

Liftosaur

This app automates strength training by allowing users to build custom progressive overload programs or use pre-built routines. It tracks workouts, visualizes progress, and automatically adjusts weights and reps based on user-defined logic, making it a smart fitness companion.

Highlights
  • Automated progressive overload
  • Scriptable workout builder (Liftoscript)
  • Pre-built popular lifting programs
  • Workout tracking and progress visualization
  • Rest timers and plate calculator
  • Body weight and measurement tracking
  • Cloud backup and cross-device sync
Features
Read full description

Liftosaur is the most customizable weightlifting app and strength training tracker and planner. # Automate Your Strength Training Build your own progressive overload programs or start with proven routines like GZCLP, 5/3/1, or Basic Beginner Routine. Track every workout, visualize your progress, and fully automate your training — all in one smart fitness app. Stop guessing your next weight. Liftosaur automatically increases or decreases your weights and reps based on the logic you define. It allows to implement any possible progressive overload logic, so you can focus on lifting while the app handles the math. Liftosaur introduces Liftoscript — a simple text language for building workouts like code. Define exercises, sets, and logic once right in text, and the app updates it automatically after each session. Example: ``` # Week 1 ## Day 1 Bent Over Row / 2x5, 1x5+ / 95lb / progress: lp(2.5lb) Bench Press / 2x5, 1x5+ / 45lb / progress: lp(2.5lb) Squat / 2x5, 1x5+ / 45lb / progress: lp(5lb) ## Day 2 Chin Up / 2x5, 1x5+ / 0lb / progress: lp(2.5lb) Overhead Press / 2x5, 1x5+ / 45lb / progress: lp(2.5lb) Deadlift / 2x5, 1x5+ / 95lb / progress: lp(5lb) ``` This makes Liftosaur the only scriptable workout app — perfect for lifters who love structure, logic, and data. # Popular Programs Included Liftosaur comes with pre-built lifting programs and templates from the strength community: • All GZCL programs: GZCLP, P-Zero, The Rippler, VHF, VDIP, General Gainz, etc • 5/3/1 and its variations • Basic Beginner Routine from r/Fitness • Strong Curves • And many more! Every program is written in Liftoscript, so you can customize every detail — sets, reps, progression rules, and deloads. # Track Everything Liftosaur isn’t just a gym tracker — it’s your complete workout planner and data companion. • Rest timers & plate calculator • Body weight and measurement tracking • Graphs for exercises and progress over time • Equipment rounding & exercise substitutions • Cloud backup and cross-device sync • Web Editor for faster program creation on desktop # Made for Powerlifters and Beginners Alike Whether you’re starting your first strength program or fine-tuning an advanced powerlifting routine, Liftosaur adapts to your style. It’s a lifting program builder, progress tracker, and gym log app — all working together to make you stronger. Weightlifting is a long game, and if you're serious about lifting, building strength and sculpting your body, Liftosaur would be a great partner in your journey. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

531 Strength4 screens
Liftosaur4 screens

Verdict

The call

The clearest difference is ads: Liftosaur at none against 531 Strength's shown. Liftosaur also leads on update cadence (weekly vs every 2 months). 531 Strength's advantage is ratings volume (12K vs 417). On price, rating, review sentiment and in-app purchases 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. 531 Strength sells 4 one-off in-app purchases and Liftosaur sells 3 in-app purchases, starting at $4.99 per month. 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 531 Strength against 4.9 for Liftosaur. That said, the two scores are not equally well evidenced: 531 Strength has 12K ratings behind it against 417, so its average is the more settled of the two. Written reviews are what separate them: 94% of 531 Strength's written reviews are positive against 90% of Liftosaur's.

UpkeepUpdate frequency

531 Strength ships an update every 2 months, Liftosaur weekly. Both last shipped on October 13, 2026.

Scorecard3 real differences · 7 level
531 Strength versus Liftosaur: the parameters behind the verdict, then further details
Parameter531 StrengthLiftosaur
PriceFreeFree
Rating4.9 (12K ratings)4.9 (417 ratings)
Positive reviews93.5% of reviews — better89.9% of reviews
Number of ratings12K — better417
Update frequencyEvery 2 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS17.617.0 — better
Further details — not scored
Size28 MB64 MB
Age rating4+17+
DeveloperHenrik JachobsenLiftosaur, LLC

Customer experience

531 Strength

All ratings11,581 ratings
Positive98.0%
Neutral1.2%
Negative0.8%
Written reviews277 reviews
Positive93.5%
Neutral2.9%
Negative3.6%

Liftosaur

All ratings417 ratings
Positive95.9%
Neutral2.4%
Negative1.7%
Written reviews79 reviews
Positive89.9%
Neutral7.6%
Negative2.5%

User reviews

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

Liftosaur

From 417 App Store ratings

What we love

  • ✨ Highly customizable workouts
  • 🚀 Efficient workout tracking
  • 💡 Innovative Liftoscript feature
  • 💰 Incredible value (lifetime subscription)
  • 🤝 Excellent developer support

Room to improve

  • 📚 Steep learning curve
  • 🐛 Frequent app crashes due to updates
  • 🔄 Sync issues with Apple Health
  • 🐌 UI could use a polish
  • 🤔 Some users find it too technical

Bugs and requests

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

Liftosaur

Reported bugs

8 issues
  • App crashes frequently after updates
  • Syncing issues with iPhone Health app
  • App freezes on startup screen, requires reinstallation
  • Changes to program not saving correctly
  • Error when trying to set different warm-ups for different weeks
Show 3 more
  • Cannot change equipment type from cable to barbell
  • Pulls reps and weight from wrong days
  • Newest update crashes the app, prevents program selection/editing

Requested features

4 requests
  • Dark mode option
  • Ability to use kgs for barbell and lbs for dumbbells
  • More intuitive UI for beginners
  • Improved documentation/organization of ideas

In-app purchases

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
3 purchases

Liftosaur

Subscriptions2
  • Monthly Subscription14 Days trial$4.991 Month
  • Yearly Subscription14 Days trial$39.991 Year
One-time1
  • Lifetime Subscription$99.99

Questions

Is 531 Strength free?
531 Strength is free to download, with in-app purchases available.
Is Liftosaur free?
Liftosaur is free to download, with in-app purchases available.
Which has better reviews, 531 Strength or Liftosaur?
531 Strength and Liftosaur are both rated 4.9 out of 5 on the App Store, from 12K and 417 ratings respectively.
Do 531 Strength or Liftosaur have ads?
531 Strength shows ads; Liftosaur does not.
Which is updated more often, 531 Strength or Liftosaur?
531 Strength ships an update every 2 months, and Liftosaur weekly. Most recently, 531 Strength was updated on October 13, 2026 and Liftosaur on October 13, 2026.

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