# Peptide Stack vs My Pet Rx

The clearest difference is ads: My Pet Rx at none against Peptide Stack's shown. Peptide Stack's advantage is update cadence (daily vs every 5 days) and iOS requirement (18.0 vs 26.2). On price, in-app purchases 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 and My Pet Rx sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Peptide Stack ships an update daily, My Pet Rx every 5 days. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Peptide Stack | My Pet Rx |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 6 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Brandon King](https://appshunter.io/developer/1879265719) | [Buck Deitz](https://appshunter.io/developer/1846218729) |

## What reviewers say

### 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 |


### My Pet Rx

[App page](https://appshunter.io/ios/app/my-pet-rx/id6760552794)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rx+ Monthly | $2.99 | per month |
| Rx+ Annual | $19.99 | per year |


## Frequently asked questions

### Is Peptide Stack free?

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

### Is My Pet Rx free?

My Pet Rx is free to download, with in-app purchases available.

### Do Peptide Stack or My Pet Rx have ads?

Peptide Stack shows ads; My Pet Rx does not.

### Which is updated more often, Peptide Stack or My Pet Rx?

Peptide Stack ships an update daily, and My Pet Rx every 5 days. Most recently, Peptide Stack was updated on October 2, 2026 and My Pet Rx on October 7, 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.*