# Stackr vs COMPOUND

The clearest difference is update cadence: Stackr at every 4 days against COMPOUND's every 9 days. Stackr also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Stackr sells 2 in-app purchases, starting at $4.99 per month and COMPOUND sells 5 in-app purchases, starting at $6.99 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 5.0 for COMPOUND. Both are backed by a comparable volume of ratings — 8 and 3 respectively.

Stackr ships an update every 4 days, COMPOUND every 9 days. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Stackr | COMPOUND |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/stackr-peptide-tracker/id6761287143/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/compound-peptide-calculator/id6762041256/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 53 MB | 52 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Alexander Hoogland](https://appshunter.io/developer/1878011747) | [Torben Nils Seidler](https://appshunter.io/developer/1834241692) |

## 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 |


### COMPOUND

[App page](https://appshunter.io/ios/app/compound-peptide-calculator/id6762041256)

This app provides advanced tracking and analysis for peptide and TRT protocols. It uses AI to analyze interactions, correlate side effects with dosing, and scan bloodwork results. Manage complex stacks with smart reconstitution, a comprehensive database, and interactive pharmacokinetics.

**Highlights:** AI Stack Analyzer for interaction warnings, Side-Effect Correlation Engine, Bloodwork OCR Scanner, Smart Reconstitution calculations, 42-Compound Database with research links, Protocol AI Chat for personalized advice, Interactive Stack Pharmacokinetics visualization

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compound Pro · Weekly | $6.99 | per 7 days |
| Compound Pro · Quarterly | $24.99 | per 3 months |
| Compound Pro · Yearly DISCOUNTED | $34.99 | per year |
| Compound Pro · Yearly | $49.99 | per year |
| COMPOUND Pro · Yearly | $69.99 | per year |


## Frequently asked questions

### Is Stackr free?

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

### Is COMPOUND free?

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

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

Stackr and COMPOUND are both rated 5.0 out of 5 on the App Store, from 8 and 3 ratings respectively.

### Do Stackr or COMPOUND have ads?

Neither Stackr nor COMPOUND shows ads.

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

Stackr ships an update every 4 days, and COMPOUND every 9 days. Most recently, Stackr was updated on September 28, 2026 and COMPOUND on September 29, 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.*