531 Strength vs nSuns 5/3/1
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.
nSuns 5/3/1
This app is a dedicated companion for the nSuns 5/3/1 strength training program. It allows users to log lifts, track progress, and automatically calculates weight progression based on training max and AMRAP results. Customizable features and progress charts help users optimize their workouts.
- Log lifts and track progress
- Automatic weight progression
- AMRAP-driven programming
- Customizable accessory exercises
- Rest timer with Apple Watch support
- Progress charts for main lifts
- iCloud sync
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The dedicated tracking companion for the nSuns 5/3/1 strength program. Log your lifts, track your progress, and let the app handle the math. Your Training Max and AMRAP results drive automatic weight progression — no spreadsheets needed. FEATURES • 4-day, 5-day, 6-day Squat and 6-day Deadlift templates • Automatic weight and rep programming based on your Training Max • AMRAP-driven progression — lift more, the app adjusts automatically • Customizable accessory exercises for each day • Rest timer with Apple Watch support • Progress charts for each main lift • iCloud sync — workouts and history across all your devices • Metric and imperial units APPLE WATCH A companion watch app keeps your rest timer and current set on your wrist. ABOUT THE PROGRAM The nSuns 5/3/1 LP program was created by reddit user /u/nSuns. For details: reddit.com/r/nSuns ABOUT THIS APP Built by a lifter, for lifters. Free to download — no paywalled core features. If you find it useful, a rating in the App Store means a lot. Contact: reddit.com/u/jonnybeegod
Screenshots
Verdict
The clearest difference is ads: nSuns 5/3/1 at none against 531 Strength's shown. nSuns 5/3/1 also leads on update cadence (every 9 days vs every 2 months). On price, rating, review sentiment and ratings volume 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 nSuns 5/3/1 sells 6 one-off in-app purchases. 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 nSuns 5/3/1. Both are backed by a comparable volume of ratings — 12K and 4.9K respectively. Written reviews are what separate them: 94% of 531 Strength's written reviews are positive against 97% of nSuns 5/3/1's.
531 Strength ships an update every 2 months, nSuns 5/3/1 every 9 days. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.
| Parameter | 531 Strength | nSuns 5/3/1 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (12K ratings) | 4.9 (4.9K ratings) — better |
| Positive reviews | 94.0% of reviews | 96.7% of reviews — better |
| Number of ratings | 12K — better | 4.9K |
| Update frequency | Every 2 months | Every 9 days — 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, Apple Watch |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 8 MB |
| Age rating | 4+ | 9+ |
| Developer | Henrik Jachobsen | Jonas Reichert |
Customer experience
531 Strength
nSuns 5/3/1
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
nSuns 5/3/1
From 4.9K App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Helps track progress
- 🚀 Seamless workout tracking
- 👍 Customizable templates
- 🚀 Automatic weight calculations
Room to improve
- 🐛 Occasional bugs or glitches
- 💡 Lack of ability to change workout days
- 💡 Limited accessory exercise customization
- 💡 No option to carry over accessory exercises
- 💡 No plate calculator or weight breakdown
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
nSuns 5/3/1
Reported bugs
3 issues- Workout template not updating correctly
- Timer issues or disappearing on app switch
- Inconsistencies with training max updates
Requested features
5 requests- Ability to customize workout days
- Option to add and track custom accessory exercises
- Carry over accessory exercises to next cycle
- Plate calculator or weight breakdown feature
- Notes section for each workout
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
nSuns 5/3/1
- Beer$0.99
- Coffee$1.99
- Protein Brownie$2.99
Show 3 moreShow fewer
- Protein Shake$3.99
- Gym Weekly Fee$4.99
- Supporter$8.99
Questions
Is 531 Strength free?
Is nSuns 5/3/1 free?
Which has better reviews, 531 Strength or nSuns 5/3/1?
Do 531 Strength or nSuns 5/3/1 have ads?
Which is updated more often, 531 Strength or nSuns 5/3/1?
Other comparisons
