# 531 Strength vs My 1 Rep Max

The clearest difference is review sentiment: 531 Strength at 94% against My 1 Rep Max's 57%. 531 Strength also leads on rating (4.9 vs 4.4) and ratings volume (12K vs 119). My 1 Rep Max's advantage is ads (none vs shown) and update cadence (every 10 days vs every 2 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. 531 Strength sells 4 one-off in-app purchases and My 1 Rep Max sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

531 Strength holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: 531 Strength has 12K ratings behind it against 119, so its average is the more settled of the two. Written reviews point the same way: 94% of 531 Strength's written reviews are positive against 57% of My 1 Rep Max's.

531 Strength ships an update every 2 months, My 1 Rep Max every 10 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 531 Strength | My 1 Rep Max |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (12K ratings)](https://appshunter.io/ios/app/531-strength/id1062989244/reviews)** | [4.4 (119 ratings)](https://appshunter.io/ios/app/my-1-rep-max/id1317637753/reviews) |
| Number of ratings | **12K** | 119 |
| Positive reviews | **94.0% of reviews** | 57.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 26 MB | 23 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Henrik Jachobsen](https://appshunter.io/developer/497731838) | [James T. Constant](https://appshunter.io/developer/1317637752) |

## What reviewers say

### 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


### My 1 Rep Max

[App page](https://appshunter.io/ios/app/my-1-rep-max/id1317637753)

Estimate your one rep max weight for various lifts using popular formulas. Track your progress over time with a built-in logbook. Offers custom lift creation and extended repetition calculations with a premium upgrade.

**Highlights:** 1 Rep Max calculator, Logbook for progress tracking, Multiple popular formulas, Custom lift creation (Premium), Extended repetition calculations (Premium)

**Features:** iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| My 1 Rep Max Premium | $7.99 | one-time |


## Frequently asked questions

### Is 531 Strength free?

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

### Is My 1 Rep Max free?

My 1 Rep Max is free to download, with in-app purchases available.

### Which has better reviews, 531 Strength or My 1 Rep Max?

531 Strength is rated higher. 531 Strength averages 4.9 out of 5 from 12K ratings, while My 1 Rep Max averages 4.4 from 119 ratings.

### Do 531 Strength or My 1 Rep Max have ads?

531 Strength shows ads; My 1 Rep Max does not.

### Which is updated more often, 531 Strength or My 1 Rep Max?

531 Strength ships an update every 2 months, and My 1 Rep Max every 10 days. Most recently, 531 Strength was updated on November 10, 2026 and My 1 Rep Max on November 6, 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.*