# PepStack vs OptyPeptides

The clearest difference is in-app purchases: OptyPeptides at none against PepStack's 2. PepStack's advantage is update cadence (every 2 days vs fortnightly) and iOS requirement (15.5 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. PepStack sells 2 in-app purchases, starting at $2.99 per month. OptyPeptides asks for nothing beyond the download.

PepStack ships an update every 2 days, OptyPeptides fortnightly. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PepStack | OptyPeptides |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/optypeptides/id6760362492/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | — | Free |
| Size | 85 MB | 15 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Max Berktold](https://appshunter.io/developer/1596273015) | [OptiSelf LLC](https://appshunter.io/developer/1701151644) |

## What reviewers say

### PepStack

[App page](https://appshunter.io/ios/app/pepstack-biohacking-tracker/id6760306960)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepStack Premium (Monthly) | $2.99 | per month |
| PepStack Premium (Yearly) | $22.99 | per year |


### OptyPeptides

[App page](https://appshunter.io/ios/app/optypeptides/id6760362492)

This app helps users discover, track, and optimize peptide protocols with smart recommendations. It provides clarity, structure, and insights for both beginners and experienced users, simplifying complex stacking processes.

**Highlights:** Smart peptide recommendations, Protocol tracking, Protocol optimization, User-friendly interface, Insightful data visualization

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

**In-app purchases:** none


## Frequently asked questions

### Is PepStack free?

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

### Is OptyPeptides free?

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

### Do PepStack or OptyPeptides have ads?

Neither PepStack nor OptyPeptides shows ads.

### Which is updated more often, PepStack or OptyPeptides?

PepStack ships an update every 2 days, and OptyPeptides fortnightly. Most recently, PepStack was updated on October 7, 2026 and OptyPeptides on October 12, 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.*