# PeptideFox vs COMPOUND

The clearest difference is monetization model: PeptideFox at free against COMPOUND's free with in-app purchases. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. PeptideFox sells 2 in-app purchases, starting at $2.99 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 PeptideFox against 5.0 for COMPOUND. Both are backed by a comparable volume of ratings — 4 and 4 respectively.

PeptideFox ships an update weekly, COMPOUND every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | PeptideFox | COMPOUND |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/peptidefox/id6758572242/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/compound-peptide-calculator/id6762041256/reviews) |
| Number of ratings | 4 | 4 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 52 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [HZ29 Inc.](https://appshunter.io/developer/1873736740) | [Torben Nils Seidler](https://appshunter.io/developer/1834241692) |

## What reviewers say

### PeptideFox

[App page](https://appshunter.io/ios/app/peptidefox/id6758572242)

This app simplifies peptide math and tracking for users managing peptide protocols. It calculates precise dosages, logs daily injections, and helps build custom protocols. Manage vial inventory and track multiple peptides simultaneously for optimal results.

**Highlights:** Reconstitution calculator, Daily dose and injection log, Custom protocol management, Vial inventory tracking, Supports various peptide compounds, Private and secure data storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $19.99 | 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 PeptideFox free?

PeptideFox 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, PeptideFox or COMPOUND?

PeptideFox and COMPOUND are both rated 5.0 out of 5 on the App Store, from 4 and 4 ratings respectively.

### Do PeptideFox or COMPOUND have ads?

Neither PeptideFox nor COMPOUND shows ads.

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

PeptideFox ships an update weekly, and COMPOUND every 9 days. Most recently, PeptideFox was updated on October 24, 2026 and COMPOUND on October 24, 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.*