# Peptide Tracker vs Peptide Library and Tracker

The clearest difference is monetization model: Peptide Library and Tracker at free against Peptide Tracker's free with in-app purchases. Peptide Library and Tracker also leads on iOS requirement (16.4 vs 18.0). Peptide Tracker's advantage is ratings volume (439 vs 25). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Peptide Tracker sells 11 in-app purchases, starting at $0.99 per 7 days and Peptide Library and Tracker sells 2 in-app purchases, starting at $4.99 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 — 4.8 for Peptide Tracker against 4.7 for Peptide Library and Tracker. That said, the two scores are not equally well evidenced: Peptide Tracker has 439 ratings behind it against 25, so its average is the more settled of the two. Written reviews are what separate them: 79% of Peptide Tracker's written reviews are positive against 86% of Peptide Library and Tracker's.

Peptide Tracker ships an update fortnightly, Peptide Library and Tracker every 10 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Peptide Tracker | Peptide Library and Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (439 ratings)](https://appshunter.io/ios/app/peptide-tracker-pepflow/id6740525224/reviews)** | [4.7 (25 ratings)](https://appshunter.io/ios/app/peptide-library-and-tracker/id6755092737/reviews) |
| Number of ratings | **439** | 25 |
| Positive reviews | 79.3% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 181 MB | 78 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [keinois OU](https://appshunter.io/developer/1597616328) | [Superfime LLC](https://appshunter.io/developer/1833586524) |

## What reviewers say

### Peptide Tracker

[App page](https://appshunter.io/ios/app/peptide-tracker-pepflow/id6740525224)

Calculate peptide dosages and reconstitution accurately and quickly. Track your injections with timely reminders and live activities. Save custom formulas and sync across devices for seamless management.

**Highlights:** Peptide dosage calculation, Reconstitution guidance, Injection time tracking, Custom formula saving, Widget for daily doses, Reminders and Live Activities, iCloud sync across devices

**Features:** Family Sharing

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepFlow PRO (Weekly) | $0.99 | per 7 days |
| PepFlow PRO (Monthly) | $2.99 | per month |
| PepFlow PRO (Weekly) | $2.99 | per 7 days |
| Peptide PRO (Weekly) | $2.99 | per 7 days |
| PepFlow PRO (Weekly) | $3.99 | per 7 days |
| PepFlow PRO (Annual) | $8.99 | per year |
| PepFlow PRO (Monthly) | $9.99 | per month |
| Peptide PRO (Annual) | $14.99 | per year |
| Peptide PRO (Annual) | $19.99 | per year |
| PepFlow PRO (Annual) | $29.99 | per year |
| Peptide PRO (Annual) | $44.99 | per year |


### 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 |


## Frequently asked questions

### Is Peptide Tracker free?

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

### Is Peptide Library and Tracker free?

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

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

Peptide Tracker is rated higher. Peptide Tracker averages 4.8 out of 5 from 439 ratings, while Peptide Library and Tracker averages 4.7 from 25 ratings.

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

Neither Peptide Tracker nor Peptide Library and Tracker shows ads.

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

Peptide Tracker ships an update fortnightly, and Peptide Library and Tracker every 10 days. Most recently, Peptide Tracker was updated on October 28, 2026 and Peptide Library and Tracker 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.*