# Paul's Strength Book vs Flex Method

The clearest difference is update cadence: Flex Method at every 5 days against Paul's Strength Book's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Paul's Strength Book ships an update fortnightly, Flex Method every 5 days. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Paul's Strength Book | Flex Method |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Size | 74 MB | 76 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [The PBE Group PTY LTD](https://appshunter.io/developer/1688607754) | [Millie Marshall Fitness](https://appshunter.io/developer/1695013155) |

## What reviewers say

### Paul's Strength Book

[App page](https://appshunter.io/ios/app/pauls-strength-book/id6449305088)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Flex Method

[App page](https://appshunter.io/ios/app/flex-method/id6758858508)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Paul's Strength Book free?

Paul's Strength Book is free to download, with no in-app purchases.

### Is Flex Method free?

Flex Method is free to download, with no in-app purchases.

### Do Paul's Strength Book or Flex Method have ads?

Neither Paul's Strength Book nor Flex Method shows ads.

### Which is updated more often, Paul's Strength Book or Flex Method?

Paul's Strength Book ships an update fortnightly, and Flex Method every 5 days. Most recently, Paul's Strength Book was updated on October 13, 2026 and Flex Method on October 15, 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.*