# PepPedia vs Stackr

The clearest difference is rating: Stackr at 4.4 against PepPedia's 3.6. Stackr also leads on review sentiment (69% vs 53%) and ratings volume (232 vs 77). PepPedia's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases 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 3.6. Both are backed by a comparable volume of ratings — 77 and 232 respectively. Written reviews point the same way: 53% of PepPedia's written reviews are positive against 69% of Stackr's.

PepPedia ships an update every 6 days, Stackr weekly. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | PepPedia | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (77 ratings)](https://appshunter.io/ios/app/peppedia/id6755275369/reviews) | **[4.4 (232 ratings)](https://appshunter.io/ios/app/stackr-peptide-tracker/id6764821587/reviews)** |
| Number of ratings | 77 | **232** |
| Positive reviews | 52.9% of reviews | **69.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 77 MB | 86 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-tracker/id6764821587)

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 3.6 out of 5 from 77 ratings, while Stackr averages 4.4 from 232 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 12, 2026 and Stackr on November 13, 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.*