# Stackr vs Pepdex

The clearest difference is rating: Pepdex at 5.0 against Stackr's 4.4. Pepdex also leads on review sentiment (100% vs 67%). Stackr's advantage is ratings volume (184 vs 6) and chart position (#186 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Pepdex holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stackr has 184 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 67% of Stackr's written reviews are positive against 100% of Pepdex's.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Stackr | Pepdex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (184 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/pepdex-peptide-calculator/id6787544320/reviews)** |
| Number of ratings | **184** | 6 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Freemium | Freemium |
| Best chart rank | **#186** | — |
| Size | 88 MB | 68 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 17+ |
| Developer | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) | [ISMAEL JAVIER RUIZ](https://appshunter.io/developer/6787544322) |

## What reviewers say

### Stackr

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

**Currently charting:** #186 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 |


### Pepdex

[App page](https://appshunter.io/ios/app/pepdex-peptide-calculator/id6787544320)

Log peptides, supplements, nutrition, training, and weight with detailed tracking and an evidence-based library. An AI coach provides insights based on your data and research. Scan items to quickly log details.

**Highlights:** Track peptides, supplements, nutrition, workouts, and weight, Log compound and supplement vial levels, Scan labels for automatic data entry, Evidence-based library with research and side effects, AI Coach for personalized insights, Daily check-ins for mood, energy, and sleep

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pepdex Pro Monthly | $7.99 | per month |
| Pepdex Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is Stackr free?

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

### Is Pepdex free?

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

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

Pepdex is rated higher. Stackr averages 4.4 out of 5 from 184 ratings, while Pepdex averages 5.0 from 6 ratings.

### Do Stackr or Pepdex have ads?

Neither Stackr nor Pepdex shows ads.

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

Stackr ships an update every 4 days, and Pepdex every 4 days. Most recently, Stackr was updated on October 22, 2026 and Pepdex on October 8, 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.*