# Circadia University vs SkinStack Pro

The clearest difference is update cadence: Circadia University at every 3 weeks against SkinStack Pro's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Circadia University ships an update every 3 weeks, SkinStack Pro every 6 weeks. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Circadia University | SkinStack Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/circadia-university/id6751060742/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 49 MB | 2 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Circadia by Dr. Pugliese, Inc.](https://appshunter.io/developer/1827403830) | [Kursad Kozelo](https://appshunter.io/developer/1883936303) |

## What reviewers say

### Circadia University

[App page](https://appshunter.io/ios/app/circadia-university/id6751060742)

Access all your educational videos conveniently in one place. Receive timely updates and news through push notifications. Save your favorite content for quick access and enjoy a seamless viewing experience without needing to remember passwords.

**Highlights:** Access all videos in one app, Push notifications for news, Password-free access, Save favorite posts, Easy to use interface

**In-app purchases:** none


### SkinStack Pro

[App page](https://appshunter.io/ios/app/skinstack-pro/id6760331951)

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

**In-app purchases:** none


## Frequently asked questions

### Is Circadia University free?

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

### Is SkinStack Pro free?

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

### Do Circadia University or SkinStack Pro have ads?

Neither Circadia University nor SkinStack Pro shows ads.

### Which is updated more often, Circadia University or SkinStack Pro?

Circadia University ships an update every 3 weeks, and SkinStack Pro every 6 weeks. Most recently, Circadia University was updated on October 20, 2026 and SkinStack Pro on October 11, 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.*