# Stack vs Peppy

The clearest difference is ads: Stack at none against Peppy's shown. Peppy's advantage is update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $9.99 per 7 days and Peppy sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Stack ships an update every 3 weeks, Peppy every 5 days. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Stack | Peppy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (69 ratings)](https://appshunter.io/ios/app/peppy-glp1-and-peptide-tracker/id6782705929/reviews)** |
| Number of ratings | — | **69** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 106 MB | 57 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Amari Thomas](https://appshunter.io/developer/1868315587) | [Automation Launchpad](https://appshunter.io/developer/1887975492) |

## What reviewers say

### Stack

[App page](https://appshunter.io/ios/app/stack-peptide-tracker/id6773488687)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Weekly | $9.99 | per 7 days |
| Stack Yearly | $49.99 | per year |


### Peppy

[App page](https://appshunter.io/ios/app/peppy-glp1-and-peptide-tracker/id6782705929)

This app helps users manage their GLP-1 and peptide injections. It allows for dose tracking, unit conversion, vial organization, injection site rotation, and timely reminders. It also tracks weight and symptoms to visualize progress.

**Highlights:** Dose logging and history, MG to syringe unit conversion, Vial and stash organization, Injection site rotation map, Flexible dose reminders, Weight and symptom tracking, Local data storage

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peppy Premium Monthly | $9.99 | per month |
| Peppy Premium Yearly | $49.99 | per year |
| Peppy Premium Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Stack free?

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

### Is Peppy free?

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

### Do Stack or Peppy have ads?

Peppy shows ads; Stack does not.

### Which is updated more often, Stack or Peppy?

Stack ships an update every 3 weeks, and Peppy every 5 days. Most recently, Stack was updated on October 19, 2026 and Peppy on October 18, 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.*