# PeptidePal vs Stackr

The clearest difference is chart position: Stackr at #187 against PeptidePal's unranked. PeptidePal's advantage is device support (3 vs 1) and iOS requirement (15.5 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. PeptidePal sells 2 in-app purchases, starting at $4.99 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.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | PeptidePal | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (225 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews)** |
| Number of ratings | — | **225** |
| Positive reviews | — | 67.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Freemium |
| Best chart rank | — | **#187** |
| Size | 82 MB | 88 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [PeptidePal LLC](https://appshunter.io/developer/1885590601) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### PeptidePal

[App page](https://appshunter.io/ios/app/peptidepal-peptide-tracker/id6760661844)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PeptidePal Pro Monthly | $4.99 | per month |
| PeptidePal Pro Annual | $39.99 | per year |


### Stackr

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

**Currently charting:** #187 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 PeptidePal free?

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

### Is Stackr free?

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

### Do PeptidePal or Stackr have ads?

Neither PeptidePal nor Stackr shows ads.

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

PeptidePal ships an update weekly, and Stackr weekly. Most recently, PeptidePal was updated on November 5, 2026 and Stackr on November 9, 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.*