# StackTrax vs Bio Log Peptide Journal

The clearest difference is monetization model: StackTrax at freemium against Bio Log Peptide Journal's subscription. StackTrax also leads on update cadence (daily vs every 2 weeks) and ratings volume (7 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. StackTrax sells 2 in-app purchases, starting at $4.99 per month and Bio Log Peptide Journal sells 1 in-app purchase, starting at $3.99 per month. 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 StackTrax against 5.0 for Bio Log Peptide Journal. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

StackTrax ships an update daily, Bio Log Peptide Journal every 2 weeks. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | StackTrax | Bio Log Peptide Journal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/stacktrax-peptide-tracker/id6769495613/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/bio-log-peptide-journal/id6773158529/reviews) |
| Number of ratings | **7** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | **Freemium** | Subscription |
| Size | 32 MB | 4 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Isaiah Deutsch](https://appshunter.io/developer/1896663496) | [alexander rieger](https://appshunter.io/developer/1839352038) |

## What reviewers say

### 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 |


### Bio Log Peptide Journal

[App page](https://appshunter.io/ios/app/bio-log-peptide-journal/id6773158529)

This app provides a private journal for tracking peptides, compounds, and related health data. It helps organize schedules, vial notes, labs, and progress with AI-powered insights. It is for personal tracking and informational purposes only.

**Highlights:** Peptide and compound tracking, Dose logs and history, Schedule reminders, Vial and inventory notes, Side effect tracking, Lab and biomarker logging, Progress photos and notes, AI summaries and insights

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bio Log Membership | $3.99 | per month |


## Frequently asked questions

### Is StackTrax free?

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

### Is Bio Log Peptide Journal free?

Bio Log Peptide Journal is free to download, with in-app purchases available.

### Which has better reviews, StackTrax or Bio Log Peptide Journal?

StackTrax and Bio Log Peptide Journal are both rated 5.0 out of 5 on the App Store, from 7 and 2 ratings respectively.

### Do StackTrax or Bio Log Peptide Journal have ads?

Neither StackTrax nor Bio Log Peptide Journal shows ads.

### Which is updated more often, StackTrax or Bio Log Peptide Journal?

StackTrax ships an update daily, and Bio Log Peptide Journal every 2 weeks. Most recently, StackTrax was updated on October 6, 2026 and Bio Log Peptide Journal on October 2, 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.*