# Peptide Calendar vs Stacksy

The clearest difference is review sentiment: Stacksy at 100% against Peptide Calendar's 0%. Stacksy also leads on rating (5.0 vs 1.0) and ratings volume (16 vs 1). Peptide Calendar's advantage is monetization model (freemium vs subscription). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Peptide Calendar sells 2 in-app purchases, starting at $9.99 per month and Stacksy sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Stacksy holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Stacksy has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Peptide Calendar's written reviews are positive against 100% of Stacksy's.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Peptide Calendar | Stacksy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/peptide-calendar/id6759353949/reviews) | **[5.0 (16 ratings)](https://appshunter.io/ios/app/stacksy/id6782694853/reviews)** |
| Number of ratings | 1 | **16** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | **Freemium** | Subscription |
| Size | 45 MB | 65 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [KAYU Health, A Medical Corporation](https://appshunter.io/developer/1878253387) | [Velor4 LLC](https://appshunter.io/developer/6782694855) |

## What reviewers say

### Peptide Calendar

[App page](https://appshunter.io/ios/app/peptide-calendar/id6759353949)

Manage personal peptide protocols with a clinician. Track progress, log daily check-ins, and monitor wellness trends. Includes a reference library and optional Apple Health integration.

**Highlights:** Personal protocol management, Schedule and check-in logging, In-app reminders, Wellness trend tracking, Apple Health integration, Peptide reference library

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription | $79.99 | per year |


### 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 |


## Frequently asked questions

### Is Peptide Calendar free?

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

### Is Stacksy free?

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

### Which has better reviews, Peptide Calendar or Stacksy?

Stacksy is rated higher. Peptide Calendar averages 1.0 out of 5 from 1 ratings, while Stacksy averages 5.0 from 16 ratings.

### Do Peptide Calendar or Stacksy have ads?

Neither Peptide Calendar nor Stacksy shows ads.

### Which is updated more often, Peptide Calendar or Stacksy?

Peptide Calendar ships an update every 2 days, and Stacksy every 2 days. Most recently, Peptide Calendar was updated on October 18, 2026 and Stacksy on October 11, 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.*