531 Strength vs Liftosaur
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Calculate 5/3/1 weights
- Track 1RM for exercises
- View cycle step weights
- Round weights to available plates
- Full overview of weights, reps, sets
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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.
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.
- 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
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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
Verdict
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
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.
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.
531 Strength ships an update every 2 months, Liftosaur weekly. Both last shipped on October 13, 2026.
| Parameter | 531 Strength | Liftosaur |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (12K ratings) | 4.9 (417 ratings) |
| Positive reviews | 93.5% of reviews — better | 89.9% of reviews |
| Number of ratings | 12K — better | 417 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 64 MB |
| Age rating | 4+ | 17+ |
| Developer | Henrik Jachobsen | Liftosaur, LLC |
Customer experience
531 Strength
Liftosaur
User reviews
531 Strength
From 12K App Store ratingsWhat 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 ratingsWhat 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
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- 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
531 Strength
- Additional exercises$1.99
- Adjustable set$1.99
- Plate calculator$1.99
Show 1 moreShow fewer
- Progress log$6.99
Liftosaur
- Monthly Subscription14 Days trial$4.991 Month
- Yearly Subscription14 Days trial$39.991 Year
- Lifetime Subscription$99.99








