# Stackr vs Pepp AI

The clearest difference is rating: Pepp AI at 5.0 against Stackr's 4.4. Stackr's advantage is ratings volume (174 vs 2). 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 Pepp AI sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Pepp AI holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stackr has 174 ratings behind it against 2, so its average is the more settled of the two.

Stackr ships an update every 4 days, Pepp AI every 3 days. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Stackr | Pepp AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (174 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pepp-ai/id6768091823/reviews)** |
| Number of ratings | **174** | 2 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Freemium | Freemium |
| Size | 88 MB | 12 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 17+ |
| Developer | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) | [Marius Ferraro](https://appshunter.io/developer/1888305936) |

## What reviewers say

### Stackr

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


### Pepp AI

[App page](https://appshunter.io/ios/app/pepp-ai/id6768091823)

Track peptide doses, log wellness metrics, and access a research library. Features AI-powered meal and body scans, personalized insights, and a private system for researchers.

**Highlights:** Peptide dose logging with injection site tracking, AI-powered meal and body composition analysis, Wellness tracking (sleep, mood, weight, bloodwork), Research library with 75+ peptide profiles, Vial inventory management and reconstitution calculator, Exportable PDF reports for healthcare providers

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pepp Ai Monthly | $9.99 | per month |
| Pepp Ai yearly | $39.99 | per year |


## Frequently asked questions

### Is Stackr free?

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

### Is Pepp AI free?

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

### Which has better reviews, Stackr or Pepp AI?

Pepp AI is rated higher. Stackr averages 4.4 out of 5 from 174 ratings, while Pepp AI averages 5.0 from 2 ratings.

### Do Stackr or Pepp AI have ads?

Neither Stackr nor Pepp AI shows ads.

### Which is updated more often, Stackr or Pepp AI?

Stackr ships an update every 4 days, and Pepp AI every 3 days. Most recently, Stackr was updated on October 18, 2026 and Pepp AI on October 5, 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.*