# 531 Trainer vs Intensity

The clearest difference is in-app purchases: 531 Trainer at none against Intensity's 3. 531 Trainer also leads on review sentiment (82% vs 64%) and iOS requirement (7.1 vs 15.6). Intensity's advantage is rating (4.6 vs 4.3) and ratings volume (191 vs 10). On price, update cadence and ads there is nothing between them.

Both are free to download. Intensity sells 3 in-app purchases, starting at $2.99 per month. 531 Trainer asks for nothing beyond the download.

Intensity holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Intensity has 191 ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 82% of 531 Trainer's written reviews are positive against 64% of Intensity's, so the app with the better star average is not the one people write more warmly about.

531 Trainer ships an update fortnightly, Intensity every 4 weeks. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 531 Trainer | Intensity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/531-trainer/id870272886/reviews) | **[4.6 (191 ratings)](https://appshunter.io/ios/app/intensity-powerlifting-log/id1047407323/reviews)** |
| Number of ratings | 10 | **191** |
| Positive reviews | **81.8% of reviews** | 64.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 44 MB |
| Requires iOS | **7.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Kevin French](https://appshunter.io/developer/870272889) | [Taylor Hamling](https://appshunter.io/developer/1022381017) |

## 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


### Intensity

[App page](https://appshunter.io/ios/app/intensity-powerlifting-log/id1047407323)

This app helps you optimize your training for progression by tracking your strength and progress. It offers a user-friendly interface for planning and logging workouts, with in-depth stats, custom goals, and personal record tracking.

**Highlights:** Workout planning and logging, In-depth training statistics, Customizable goals and personal records, Support for popular powerlifting programs, AI program generation, Cloud sync across platforms, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intensity Premium | $2.99 | per month |
| Intensity Premium Yearly | $17.99 | per year |
| Intensity Lifetime Premium | $34.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 💪 Great for tracking lifts
- 💡 Highly customizable
- 🚀 Efficient workout logging
- ✅ Comprehensive exercise database

**What reviewers complain about**

- 🐛 Frequent bugs and crashes
- 📉 Data loss issues
- ⚠️ Inconsistent metric units (kg/lb)
- ❌ Unusable after recent updates
- 🖱️ Touch input latency

**Reported bugs**

- Workouts not saving
- App randomly closes
- Metrics shifting between kg and lb
- App crashes with 'Unable to Load App' error
- Workout diary not accurately tracking days

**Requested features**

- Add widgets
- Dark mode option
- Display RPE on main screen
- Track RPE with every set
- Abbreviate drop sets/super sets


## Frequently asked questions

### Is 531 Trainer free?

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

### Is Intensity free?

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

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

Intensity is rated higher. 531 Trainer averages 4.3 out of 5 from 10 ratings, while Intensity averages 4.6 from 191 ratings.

### Do 531 Trainer or Intensity have ads?

Neither 531 Trainer nor Intensity shows ads.

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

531 Trainer ships an update fortnightly, and Intensity every 4 weeks. Most recently, 531 Trainer was updated on October 23, 2026 and Intensity on October 21, 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.*