# Peptara vs Stackr

The clearest difference is update cadence: Stackr at every 4 days against Peptara's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Peptara sells 2 in-app purchases, starting at $7.99 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.

Peptara ships an update every 3 months, Stackr every 4 days. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Peptara | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (174 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews)** |
| Number of ratings | — | **174** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 10 MB | 88 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [BILLY PAUL MASON](https://appshunter.io/developer/1826641546) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### Peptara

[App page](https://appshunter.io/ios/app/peptara-peptide-tracker/id6763570212)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peptara Pro | $7.99 | per month |
| Peptara Pro | $59.99 | per year |


### 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 |


## Frequently asked questions

### Is Peptara free?

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

### Is Stackr free?

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

### Do Peptara or Stackr have ads?

Neither Peptara nor Stackr shows ads.

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

Peptara ships an update every 3 months, and Stackr every 4 days. Most recently, Peptara was updated on October 2, 2026 and Stackr on October 18, 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.*