# SkinMax vs Stack

The clearest difference is update cadence: SkinMax at daily against Stack's every 8 days. SkinMax also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SkinMax sells 2 in-app purchases, starting at $5.99 per month and Stack sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SkinMax ships an update daily, Stack every 8 days. The most recent releases landed on May 16, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | SkinMax | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 8 days |
| Size | 39 MB | 136 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Esteban Giorgetti](https://appshunter.io/developer/1867792455) | [Amari Thomas](https://appshunter.io/developer/1868315587) |

## What reviewers say

### SkinMax

[App page](https://appshunter.io/ios/app/skinmax-ai-face-scanner/id6758164262)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SkinMax+ Monthly | $5.99 | per month |
| SkinMax+ Yearly | $39.99 | per year |


### 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 SkinMax free?

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

### Is Stack free?

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

### Do SkinMax or Stack have ads?

Neither SkinMax nor Stack shows ads.

### Which is updated more often, SkinMax or Stack?

SkinMax ships an update daily, and Stack every 8 days. Most recently, SkinMax was updated on May 16, 2026 and Stack on September 14, 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.*