# PeptideOS+ vs Stack

PeptideOS+ and Stack are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. PeptideOS+ sells 2 in-app purchases, starting at $9.99 per month and Stack sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | PeptideOS+ | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Size | 6 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [ZACHARY CANCIANO GOLD](https://appshunter.io/developer/1875956705) | [HELGE JOHANNESSEN BJORLAND](https://appshunter.io/developer/1896590622) |

## What reviewers say

### PeptideOS+

[App page](https://appshunter.io/ios/app/peptideos-plus/id6762200959)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $69.99 | per year |


### Stack

[App page](https://appshunter.io/ios/app/stack-supplement-tracker/id6790706147)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro Monthly | $2.99 | per month |
| Stack Pro Yearly | $19.99 | per year |
| Stack Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is PeptideOS+ free?

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

### Is Stack free?

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

### Do PeptideOS+ or Stack have ads?

Neither PeptideOS+ 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.*