# Primio vs Aventus | Osiris

The clearest difference is update cadence: Primio at every 5 weeks against Aventus | Osiris's every 4 months. Aventus | Osiris'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, Aventus | Osiris every 4 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Primio | Aventus | Osiris |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 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


### Aventus | Osiris

[App page](https://appshunter.io/ios/app/aventus-osiris/id1632011986)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Primio free?

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

### Is Aventus | Osiris free?

Aventus | Osiris is free to download, with no in-app purchases.

### Do Primio or Aventus | Osiris have ads?

Neither Primio nor Aventus | Osiris shows ads.

### Which is updated more often, Primio or Aventus | Osiris?

Primio ships an update every 5 weeks, and Aventus | Osiris every 4 months. Most recently, Primio was updated on October 30, 2026 and Aventus | Osiris on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*