# Paul's Strength Book vs Peptide Stack

The clearest difference is in-app purchases: Paul's Strength Book at none against Peptide Stack's 2. Paul's Strength Book also leads on ads (none vs shown) and iOS requirement (15.1 vs 18.0). Peptide Stack's advantage is update cadence (daily vs fortnightly). On price and device support there is nothing between them.

Both are free to download. Peptide Stack sells 2 in-app purchases, starting at $9.99 per month. Paul's Strength Book asks for nothing beyond the download.

Paul's Strength Book ships an update fortnightly, Peptide Stack daily. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Paul's Strength Book | Peptide Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/peptide-stack-glp-1-tracker/id6759533641/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Daily** |
| Monetization | — | Free with in-app purchases |
| Size | 74 MB | 13 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [The PBE Group PTY LTD](https://appshunter.io/developer/1688607754) | [Brandon King](https://appshunter.io/developer/1879265719) |

## 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


### Peptide Stack

[App page](https://appshunter.io/ios/app/peptide-stack-glp-1-tracker/id6759533641)

Track your GLP-1 medication doses and monitor your weight progress. This app supports various peptide medications and custom stacks, helping you manage your health journey.

**Highlights:** GLP-1 medication tracking, Weight progress monitoring, Custom peptide stack support, Dose logging, Subscription management

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| Annual Plan | $49.99 | per year |


## Frequently asked questions

### Is Paul's Strength Book free?

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

### Is Peptide Stack free?

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

### Do Paul's Strength Book or Peptide Stack have ads?

Peptide Stack shows ads; Paul's Strength Book does not.

### Which is updated more often, Paul's Strength Book or Peptide Stack?

Paul's Strength Book ships an update fortnightly, and Peptide Stack daily. Most recently, Paul's Strength Book was updated on October 13, 2026 and Peptide Stack on October 2, 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.*