# PepCalc Pro vs StackTrax

The clearest difference is price: StackTrax at Free against PepCalc Pro's $2.99. StackTrax also leads on update cadence (daily vs every 4 months) and ratings volume (7 vs 1). PepCalc Pro's advantage is in-app purchases (none vs 2). On rating, review sentiment, ads and device support there is nothing between them.

StackTrax is free to download; PepCalc Pro costs $2.99 up front. StackTrax sells 2 in-app purchases, starting at $4.99 per month. PepCalc Pro asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PepCalc Pro against 5.0 for StackTrax. That said, the two scores are not equally well evidenced: StackTrax has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

PepCalc Pro ships an update every 4 months, StackTrax daily. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PepCalc Pro | StackTrax |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/pepcalc-pro/id6757834926/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/stacktrax-peptide-tracker/id6769495613/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Monetization | Paid | **Freemium** |
| Size | 41 MB | 32 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Matthew Fishman](https://appshunter.io/developer/1838052729) | [Isaiah Deutsch](https://appshunter.io/developer/1896663496) |

## What reviewers say

### PepCalc Pro

[App page](https://appshunter.io/ios/app/pepcalc-pro/id6757834926)

This app offers precise calculations for research protocols, managing inventory, and scheduling tasks. It provides a verifiable audit trail with transparent math and is designed for offline use with a focus on user privacy. Export your records in various formats for external documentation.

**Highlights:** Precision concentration calculations, Visual protocol calendar and scheduling, Seamless inventory management, Verifiable records with audit trail, Offline-first data privacy, Professional CSV/PDF exporting

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

**In-app purchases:** none


### StackTrax

[App page](https://appshunter.io/ios/app/stacktrax-peptide-tracker/id6769495613)

Track peptide protocols and GLP-1 titrations with detailed logging, reminders, and injection site rotation. Access a research library and integrate with Oura for comprehensive health insights. Includes nutrition tracking and an AI protocol importer.

**Highlights:** Peptide and GLP-1 tracking, Dose logging and reminders, Injection site rotation, Research library with compound guides, Oura integration, AI Protocol Importer, Nutrition tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is PepCalc Pro free?

PepCalc Pro costs $2.99, with no in-app purchases.

### Is StackTrax free?

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

### Which has better reviews, PepCalc Pro or StackTrax?

PepCalc Pro and StackTrax are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.

### Do PepCalc Pro or StackTrax have ads?

Neither PepCalc Pro nor StackTrax shows ads.

### Which is updated more often, PepCalc Pro or StackTrax?

PepCalc Pro ships an update every 4 months, and StackTrax daily. Most recently, PepCalc Pro was updated on October 19, 2026 and StackTrax on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*