# Stacksy vs PeptGPT

The clearest difference is in-app purchases: PeptGPT at none against Stacksy's 5. Stacksy's advantage is update cadence (every 2 days vs weekly) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Stacksy sells 5 in-app purchases, starting at $9.99 per month. PeptGPT asks for nothing beyond the download.

Stacksy ships an update every 2 days, PeptGPT weekly. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Stacksy | PeptGPT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (16 ratings)](https://appshunter.io/ios/app/stacksy/id6782694853/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Subscription | — |
| Size | 65 MB | 17 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Velor4 LLC](https://appshunter.io/developer/6782694855) | [MagicBrain AI](https://appshunter.io/developer/1758970430) |

## What reviewers say

### Stacksy

[App page](https://appshunter.io/ios/app/stacksy/id6782694853)

Organize and track your personal peptide protocol with this private application. Manage your entire routine, including what peptides to take and when. Offers monthly and yearly subscription plans for full access.

**Highlights:** Organize peptide protocols, Track peptide dosages, Schedule peptide intake, Private routine management, GLP-1 tracking

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stacksy Pro (Monthly) | $9.99 | per month |
| Stacksy Pro (Yearly) | $24.99 | per year |
| Stacksy Pro (Yearly) | $24.99 | per year |
| Stacksy Pro (Yearly) | $24.99 | per year |
| Stacksy Pro (Yearly) | $39.99 | per year |


### PeptGPT

[App page](https://appshunter.io/ios/app/peptgpt-glp-1-and-dose-tracker/id6786232296)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stacksy free?

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

### Is PeptGPT free?

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

### Do Stacksy or PeptGPT have ads?

Neither Stacksy nor PeptGPT shows ads.

### Which is updated more often, Stacksy or PeptGPT?

Stacksy ships an update every 2 days, and PeptGPT weekly. Most recently, Stacksy was updated on October 11, 2026 and PeptGPT on October 14, 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.*