# PepPedia vs Stackr

The clearest difference is rating: Stackr at 4.4 against PepPedia's 3.5. Stackr also leads on review sentiment (68% vs 53%) and chart position (#192 vs unranked). PepPedia's advantage is iOS requirement (15.1 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. PepPedia sells 2 in-app purchases, starting at $6.99 per month and Stackr sells 7 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stackr holds the better App Store score, 4.4 against 3.5. Both are backed by a comparable volume of ratings — 77 and 225 respectively. Written reviews point the same way: 53% of PepPedia's written reviews are positive against 68% of Stackr's.

PepPedia ships an update every 6 days, Stackr weekly. Both last shipped on November 9, 2026.

## The numbers

| Metric | PepPedia | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (77 ratings)](https://appshunter.io/ios/app/peppedia/id6755275369/reviews) | **[4.4 (225 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews)** |
| Number of ratings | 77 | **225** |
| Positive reviews | 52.9% of reviews | **67.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | — | **#192** |
| Size | 77 MB | 88 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [PepPedia, Inc.](https://appshunter.io/developer/1852919295) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### PepPedia

[App page](https://appshunter.io/ios/app/peppedia/id6755275369)

An educational reference for peptide research, offering a comprehensive library of peptide profiles, personal tracking tools for notes and inventory, and helpful math calculators. Securely sync your data across devices to stay organized and informed.

**Highlights:** Peptide research library, Personal notes and logs, Inventory and expiration tracking, Personal metrics logging, Reconstitution calculator, Concentration math helper

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peppedia Pro Monthly | $6.99 | per month |
| Peppedia Pro Yearly | $19.99 | per year |


### Stackr

[App page](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587)

**Currently charting:** #192 Top Grossing · Health & Fitness (US App Store)

This app simplifies tracking peptide and GLP-1 doses, including supplies like vials and pens. It offers smart reminders, home screen widgets, and visual charts of estimated active levels based on half-life. Designed for users managing peptide protocols, it keeps your dosing information organized and accessible.

**Highlights:** Log peptide and GLP-1 doses, Track vials, pens, and other supplies, Smart reminders for next doses, Home screen widgets, Estimated active level charts, Multi-peptide stack tracking, Reference pages for common compounds

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackr+ Weekly | $7.99 | per 7 days |
| Monthly | $12.99 | per month |
| Stackr+ Yearly | $29.99 | per year |
| Stackr+ Yearly | $49.99 | per year |
| Stackr+ Yearly | $49.99 | per year |
| Stackr+ Yearly | $59.99 | per year |
| Yearly | $69.99 | per year |


## Frequently asked questions

### Is PepPedia free?

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

### Is Stackr free?

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

### Which has better reviews, PepPedia or Stackr?

Stackr is rated higher. PepPedia averages 3.5 out of 5 from 77 ratings, while Stackr averages 4.4 from 225 ratings.

### Do PepPedia or Stackr have ads?

Neither PepPedia nor Stackr shows ads.

### Which is updated more often, PepPedia or Stackr?

PepPedia ships an update every 6 days, and Stackr weekly. Most recently, PepPedia was updated on November 9, 2026 and Stackr on November 9, 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.*