# MyPepTracker vs Stackr

The clearest difference is in-app purchases: MyPepTracker at none against Stackr's 7. Stackr's advantage is update cadence (every 3 days vs every 4 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stackr sells 7 in-app purchases, starting at $7.99 per 7 days. MyPepTracker asks for nothing beyond the download.

MyPepTracker ships an update every 4 weeks, Stackr every 3 days. The most recent releases landed on September 5, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | MyPepTracker | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (126 ratings)](https://appshunter.io/ios/app/stackr-peptide-tracker/id6764821587/reviews)** |
| Number of ratings | — | **126** |
| Positive reviews | — | 78.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 8 MB | 58 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Gregory Roy](https://appshunter.io/developer/1892922555) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### MyPepTracker

[App page](https://appshunter.io/ios/app/mypeptracker/id6762103081)

**In-app purchases:** none


### 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 MyPepTracker free?

MyPepTracker is free to download, with no in-app purchases.

### Is Stackr free?

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

### Do MyPepTracker or Stackr have ads?

Neither MyPepTracker nor Stackr shows ads.

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

MyPepTracker ships an update every 4 weeks, and Stackr every 3 days. Most recently, MyPepTracker was updated on September 5, 2026 and Stackr on September 22, 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.*