# Peptide Library and Tracker vs Protocol

The clearest difference is update cadence: Protocol at every 2 days against Peptide Library and Tracker's every 10 days. Protocol also leads on rating (5.0 vs 4.7). Peptide Library and Tracker's advantage is ratings volume (25 vs 1). On price, ads, in-app purchases and monetization model 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 Protocol sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Protocol 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 25 ratings behind it against 1, so its average is the more settled of the two.

Peptide Library and Tracker ships an update every 10 days, Protocol every 2 days. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Peptide Library and Tracker | Protocol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (25 ratings)](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/protocol-peptides/id6764390731/reviews)** |
| Number of ratings | **25** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Monetization | Free | Free |
| Size | 78 MB | 47 MB |
| Requires iOS | **16.4** | 17.5 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Superfime LLC](https://appshunter.io/developer/1833586524) | [Alexandre Masmejean](https://appshunter.io/developer/1895978437) |

## 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 |


### Protocol

[App page](https://appshunter.io/ios/app/protocol-peptides/id6764390731)

This app helps users meticulously track peptide cycles, logging each injection with customizable details. It provides comprehensive guides on reconstitution, injection techniques, and safety, alongside personalized reminders and progress tracking.

**Highlights:** Log peptide injections with customizable details, Curated library of 25+ compounds, Add custom compounds and edit entries, Streak counter and dose history, Per-peptide reminders with native iOS notifications, Built-in safety and how-to guides, Personalized onboarding based on goals and experience

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protocol Pro | $1.99 | per 7 days |
| Protocol Pro | $39.99 | 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 Protocol free?

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

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

Protocol is rated higher. Peptide Library and Tracker averages 4.7 out of 5 from 25 ratings, while Protocol averages 5.0 from 1 ratings.

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

Neither Peptide Library and Tracker nor Protocol shows ads.

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

Peptide Library and Tracker ships an update every 10 days, and Protocol every 2 days. Most recently, Peptide Library and Tracker was updated on October 16, 2026 and Protocol 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.*