# Pep AI vs Stackr

The clearest difference is ads: Stackr at none against Pep AI's shown. Stackr also leads on review sentiment (67% vs 38%) and chart position (#186 vs unranked). Pep AI's advantage is rating (4.7 vs 4.4) and ratings volume (4K vs 184). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Pep AI sells 16 in-app purchases, starting at $3.99 per 7 days 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.

Pep AI holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Pep AI has 4K ratings behind it against 184, so its average is the more settled of the two. Written reviews complicate that: 38% of Pep AI's written reviews are positive against 67% of Stackr's, so the app with the better star average is not the one people write more warmly about.

Pep AI ships an update weekly, Stackr every 4 days. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Pep AI | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (4K ratings)](https://appshunter.io/ios/app/pep-ai-glp-1-peptide-tracker/id6758682710/reviews)** | [4.4 (184 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews) |
| Number of ratings | **4K** | 184 |
| Positive reviews | 38.4% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | — | **#186** |
| Size | 142 MB | 88 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Zode Development LLC](https://appshunter.io/developer/1851109622) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### Pep AI

[App page](https://appshunter.io/ios/app/pep-ai-glp-1-peptide-tracker/id6758682710)

This app helps you meticulously track peptide research, including inventory, logs, nutrition, wellness, and notes. It replaces scattered data with an organized, private system for consistency and offers features like injection site tracking, side effect logging, and AI-powered meal scanning.

**Highlights:** Inventory & Organization, Injection Site Tracker, Side Effects Tracking, Nutrition Logging, Meal Scanner, Apple Health Integration, Bloodwork Tracker, AI Insights

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pep Week Updated | $3.99 | per 7 days |
| Pep AI Monthly | $9.99 | per month |
| Pep Month Updated | $9.99 | per month |
| Pep AI Yearly Discount | $19.99 | per year |
| Pep AI Yearly | $19.99 | per year |
| Pep AI Yearly | $24.99 | per year |
| Pep Discount Updated | $29.99 | per year |
| Pep AI Yearly | $29.99 | per year |
| Pep AI Yearly | $29.99 | per year |
| Pep Year Updated | $29.99 | per year |
| Pep Year Updated | $34.99 | per year |
| Pep Year Updated | $39.99 | per year |
| Pep Year Updated | $39.99 | per year |
| Pep Year Updated | $44.99 | per year |
| Pep Year Subscription | $49.99 | per year |
| Pep Year Subscription | $59.99 | per year |


### 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 |


## Frequently asked questions

### Is Pep AI free?

Pep AI 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, Pep AI or Stackr?

Pep AI is rated higher. Pep AI averages 4.7 out of 5 from 4K ratings, while Stackr averages 4.4 from 184 ratings.

### Do Pep AI or Stackr have ads?

Pep AI shows ads; Stackr does not.

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

Pep AI ships an update weekly, and Stackr every 4 days. Most recently, Pep AI was updated on October 23, 2026 and Stackr on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*