# Peptide Library and Tracker vs PepStack Pro

The clearest difference is monetization model: Peptide Library and Tracker at free against PepStack Pro's freemium. PepStack Pro's advantage is rating (5.0 vs 4.8). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Peptide Library and Tracker sells 2 in-app purchases, starting at $4.99 per month and PepStack Pro sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

PepStack Pro holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 21 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Peptide Library and Tracker ships an update every 10 days, PepStack Pro every 8 days. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Peptide Library and Tracker | PepStack Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (21 ratings)](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/pepstack-pro/id6760684355/reviews)** |
| Number of ratings | **21** | 11 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 8 days** |
| Monetization | **Free** | Freemium |
| Size | 77 MB | 39 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Superfime LLC](https://appshunter.io/developer/1833586524) | [MyFlowMD, LLC](https://appshunter.io/developer/1885185443) |

## What reviewers say

### Peptide Library and Tracker

[App page](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737)

This app serves as a comprehensive guide and lab assistant for peptide research. It offers a detailed peptide library, dose calculation tools, and advanced tracking features for logging, inventory management, and protocol adherence. Users can also access educational content and community Q&A to enhance their research workflow.

**Highlights:** Comprehensive Peptide Library & Database, Advanced Peptide Dose Calculator, Smart Tracking & Calendar View, Lab Inventory Management, Protocol Tracking & Lab Assistant, Integrated Peptide Education

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peptide Library Pro Monthly | $4.99 | per month |
| Peptide Library Pro Yearly | $39.99 | per year |


### PepStack Pro

[App page](https://appshunter.io/ios/app/pepstack-pro/id6760684355)

This app provides a comprehensive database of peptides, personalized protocol recommendations, and tools to track your peptide journey. Monitor injections, log progress, and check for interactions to optimize your health and wellness goals safely.

**Highlights:** Peptide database with clinical data, Personalized peptide recommendations, Interaction checker for peptide safety, Physician-designed protocol templates, Injection schedule and dose tracking, Lab and progress journaling, Direct physician connection

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepStack Pro Premium | $8.99 | per month |
| PepStack Pro Premium | $49.99 | per year |


## Frequently asked questions

### Is Peptide Library and Tracker free?

Peptide Library and Tracker is free to download, with in-app purchases available.

### Is PepStack Pro free?

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

### Which has better reviews, Peptide Library and Tracker or PepStack Pro?

PepStack Pro is rated higher. Peptide Library and Tracker averages 4.8 out of 5 from 21 ratings, while PepStack Pro averages 5.0 from 11 ratings.

### Do Peptide Library and Tracker or PepStack Pro have ads?

Neither Peptide Library and Tracker nor PepStack Pro shows ads.

### Which is updated more often, Peptide Library and Tracker or PepStack Pro?

Peptide Library and Tracker ships an update every 10 days, and PepStack Pro every 8 days. Most recently, Peptide Library and Tracker was updated on September 30, 2026 and PepStack Pro 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.*