# Stackr vs PepKit

The clearest difference is update cadence: Stackr at every 4 days against PepKit's every 5 weeks. Stackr also leads on review sentiment (100% vs 86%) and device support (3 vs 1). PepKit's advantage is ratings volume (92 vs 8). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Stackr sells 2 in-app purchases, starting at $4.99 per month and PepKit sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Stackr against 4.9 for PepKit. That said, the two scores are not equally well evidenced: PepKit has 92 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 100% of Stackr's written reviews are positive against 86% of PepKit's.

Stackr ships an update every 4 days, PepKit every 5 weeks. The most recent releases landed on September 28, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Stackr | PepKit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/stackr-peptide-tracker/id6761287143/reviews)** | [4.9 (92 ratings)](https://appshunter.io/ios/app/pepkit-peptide-tracker/id6762627972/reviews) |
| Number of ratings | 8 | **92** |
| Positive reviews | **100.0% of reviews** | 85.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 weeks |
| Monetization | Freemium | Freemium |
| Size | 53 MB | 15 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Alexander Hoogland](https://appshunter.io/developer/1878011747) | [Loona LLC](https://appshunter.io/developer/1817974100) |

## What reviewers say

### Stackr

[App page](https://appshunter.io/ios/app/stackr-peptide-tracker/id6761287143)

Easily track supplements, peptides, and medications to ensure you never miss a dose or run out. Features include a compound library, reconstitution calculator, depletion tracking, and budget management.

**Highlights:** 200+ compound library, Reconstitution calculator, Depletion tracking, Protocol grouping, Budget tracking, Dose logging

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackr Pro Monthly | $4.99 | per month |
| Stackr Pro Annual | $39.99 | per year |


### PepKit

[App page](https://appshunter.io/ios/app/pepkit-peptide-tracker/id6762627972)

Precisely track your peptide protocols with a structured system. Log doses, calculate them accurately, and stay consistent with smart reminders and a clean interface. Designed for serious tracking.

**Highlights:** Precision dose logging, Built-in dose calculator, Structured scheduling, Smart reminders, Clean interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Annual | $44.99 | per year |


## Frequently asked questions

### Is Stackr free?

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

### Is PepKit free?

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

### Which has better reviews, Stackr or PepKit?

Stackr is rated higher. Stackr averages 5.0 out of 5 from 8 ratings, while PepKit averages 4.9 from 92 ratings.

### Do Stackr or PepKit have ads?

Neither Stackr nor PepKit shows ads.

### Which is updated more often, Stackr or PepKit?

Stackr ships an update every 4 days, and PepKit every 5 weeks. Most recently, Stackr was updated on September 28, 2026 and PepKit on October 1, 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.*