# Peptide Atlas vs Stack

The clearest difference is in-app purchases: Peptide Atlas at none against Stack's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $9.99 per 7 days. Peptide Atlas asks for nothing beyond the download.

## The numbers

| Metric | Peptide Atlas | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 8 days |
| Size | 15 MB | 136 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 17+ |
| Developer | [Tremaine Grant](https://appshunter.io/developer/1193068237) | [Amari Thomas](https://appshunter.io/developer/1868315587) |

## What reviewers say

### Peptide Atlas

[App page](https://appshunter.io/ios/app/peptide-atlas/id6772779229)

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

**In-app purchases:** none


### Stack

[App page](https://appshunter.io/ios/app/stack-peptide-tracker/id6773488687)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Weekly | $9.99 | per 7 days |
| Stack Yearly | $49.99 | per year |


## Frequently asked questions

### Is Peptide Atlas free?

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

### Is Stack free?

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

### Do Peptide Atlas or Stack have ads?

Neither Peptide Atlas nor Stack shows ads.

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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.*