# Primio vs OSIRIS Deltion College

The clearest difference is update cadence: Primio at every 5 weeks against OSIRIS Deltion College's every 3 months. OSIRIS Deltion College's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

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

Primio ships an update every 5 weeks, OSIRIS Deltion College every 3 months. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Primio | OSIRIS Deltion College |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Size | 73 MB | 34 MB |
| Requires iOS | 16.4 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Primio B.V.](https://appshunter.io/developer/1481326793) | [CACI bv](https://appshunter.io/developer/961337312) |

## What reviewers say

### Primio

[App page](https://appshunter.io/ios/app/primio/id1589413386)

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

**In-app purchases:** none


### OSIRIS Deltion College

[App page](https://appshunter.io/ios/app/osiris-deltion-college/id6497794124)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Primio free?

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

### Is OSIRIS Deltion College free?

OSIRIS Deltion College is free to download, with no in-app purchases.

### Do Primio or OSIRIS Deltion College have ads?

Neither Primio nor OSIRIS Deltion College shows ads.

### Which is updated more often, Primio or OSIRIS Deltion College?

Primio ships an update every 5 weeks, and OSIRIS Deltion College every 3 months. Most recently, Primio was updated on October 30, 2026 and OSIRIS Deltion College on November 4, 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.*