# 531 Trainer vs 531 Strength

The clearest difference is rating: 531 Strength at 4.9 against 531 Trainer's 4.3. 531 Strength also leads on ratings volume (12K vs 10) and review sentiment (94% vs 82%). 531 Trainer's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 531 Strength sells 4 one-off in-app purchases. 531 Trainer asks for nothing beyond the download.

531 Strength holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: 531 Strength has 12K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 82% of 531 Trainer's written reviews are positive against 94% of 531 Strength's.

531 Trainer ships an update fortnightly, 531 Strength every 2 months. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 531 Trainer | 531 Strength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/531-trainer/id870272886/reviews) | **[4.9 (12K ratings)](https://appshunter.io/ios/app/531-strength/id1062989244/reviews)** |
| Number of ratings | 10 | **12K** |
| Positive reviews | 81.8% of reviews | **94.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 26 MB |
| Requires iOS | **7.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kevin French](https://appshunter.io/developer/870272889) | [Henrik Jachobsen](https://appshunter.io/developer/497731838) |

## What reviewers say

### 531 Trainer

[App page](https://appshunter.io/ios/app/531-trainer/id870272886)

Simplify your strength training with this app. It calculates your daily workouts based on your max lifts, eliminating the need for spreadsheets or manual calculations at the gym. Easily progress to the next cycle with automatic weight increments.

**Highlights:** Calculates daily workouts, Automatic weight progression, One Rep Max calculator, Assistance work percentage calculator, Supports kilograms or pounds, Visual weight plate guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### 531 Strength

[App page](https://appshunter.io/ios/app/531-strength/id1062989244)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

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

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**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


## Frequently asked questions

### Is 531 Trainer free?

531 Trainer is free to download, with no in-app purchases.

### Is 531 Strength free?

531 Strength is free to download, with in-app purchases available.

### Which has better reviews, 531 Trainer or 531 Strength?

531 Strength is rated higher. 531 Trainer averages 4.3 out of 5 from 10 ratings, while 531 Strength averages 4.9 from 12K ratings.

### Do 531 Trainer or 531 Strength have ads?

531 Strength shows ads; 531 Trainer does not.

### Which is updated more often, 531 Trainer or 531 Strength?

531 Trainer ships an update fortnightly, and 531 Strength every 2 months. Most recently, 531 Trainer was updated on October 23, 2026 and 531 Strength on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*