# Peptide Library and Tracker vs PepOS

The clearest difference is monetization model: Peptide Library and Tracker at free against PepOS's freemium. Peptide Library and Tracker also leads on ratings volume (26 vs 1). PepOS's advantage is rating (5.0 vs 4.7) and review sentiment (100% vs 86%). On price, update cadence, ads and in-app purchases 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 PepOS sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

PepOS holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Peptide Library and Tracker has 26 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of Peptide Library and Tracker's written reviews are positive against 100% of PepOS's.

Peptide Library and Tracker ships an update every 10 days, PepOS fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Peptide Library and Tracker | PepOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (26 ratings)](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pepos-peptide-tracker/id6763047593/reviews)** |
| Number of ratings | **26** | 1 |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | **Free** | Freemium |
| Size | 78 MB | 29 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Superfime LLC](https://appshunter.io/developer/1833586524) | [DOHO DIGITAL, LLC](https://appshunter.io/developer/1895136742) |

## 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 |


### PepOS

[App page](https://appshunter.io/ios/app/pepos-peptide-tracker/id6763047593)

Track peptide doses, build custom protocols, and monitor your body's response with AI insights. Integrates with Apple Health for comprehensive optimization tracking. Not medical advice.

**Highlights:** AI peptide intelligence, Protocol builder, Apple Health integration, Vial inventory tracking, Injection site rotation, Progress tracking, AI insights and reports

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepOS Intelligence | $9.99 | per month |
| PepOS Intelligence | $59.99 | 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 PepOS free?

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

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

PepOS is rated higher. Peptide Library and Tracker averages 4.7 out of 5 from 26 ratings, while PepOS averages 5.0 from 1 ratings.

### Do Peptide Library and Tracker or PepOS have ads?

Neither Peptide Library and Tracker nor PepOS shows ads.

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

Peptide Library and Tracker ships an update every 10 days, and PepOS fortnightly. Most recently, Peptide Library and Tracker was updated on October 30, 2026 and PepOS on October 31, 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.*