# Peptide Library and Tracker vs PeptideBros

The clearest difference is monetization model: Peptide Library and Tracker at free against PeptideBros's freemium. Peptide Library and Tracker also leads on ratings volume (26 vs 5). PeptideBros'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 PeptideBros sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

PeptideBros 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 5, 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 PeptideBros's.

Peptide Library and Tracker ships an update every 10 days, PeptideBros every 3 weeks. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Peptide Library and Tracker | PeptideBros |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (26 ratings)](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/peptidebros/id6762238490/reviews)** |
| Number of ratings | **26** | 5 |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | **Free** | Freemium |
| Size | 78 MB | 44 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Superfime LLC](https://appshunter.io/developer/1833586524) | [Adam Farrar](https://appshunter.io/developer/1832870508) |

## 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 |


### PeptideBros

[App page](https://appshunter.io/ios/app/peptidebros/id6762238490)

This app helps researchers meticulously track peptide injection protocols, log doses, and monitor progress. It offers features like custom protocol creation, automated injection site rotation, and streak tracking for motivation. An integrated encyclopedia provides factual information on common research peptides.

**Highlights:** Custom peptide protocol creation, Automated injection site rotation, Dose logging with site and feeling score, Streak tracking for motivation, Adherence rate and pattern analytics, Research peptide encyclopedia, Journaling and notes

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lab Notebook Monthly | $4.99 | per month |
| Lab Notebook (Annual) | $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 PeptideBros free?

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

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

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

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

Neither Peptide Library and Tracker nor PeptideBros shows ads.

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

Peptide Library and Tracker ships an update every 10 days, and PeptideBros every 3 weeks. Most recently, Peptide Library and Tracker was updated on October 30, 2026 and PeptideBros on October 24, 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.*