# Aventus | Osiris vs DLS Trainingen

The clearest difference is update cadence: DLS Trainingen at every 2 weeks against Aventus | Osiris's every 4 months. Aventus | Osiris's advantage is iOS requirement (11.0 vs 15.1). 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.

Aventus | Osiris ships an update every 4 months, DLS Trainingen every 2 weeks. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Aventus | Osiris | DLS Trainingen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 34 MB | 24 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CACI bv](https://appshunter.io/developer/961337312) | [GroundControl BV](https://appshunter.io/developer/1460562399) |

## What reviewers say

### Aventus | Osiris

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DLS Trainingen

[App page](https://appshunter.io/ios/app/dls-trainingen/id6763551817)

**In-app purchases:** none


## Frequently asked questions

### Is Aventus | Osiris free?

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

### Is DLS Trainingen free?

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

### Do Aventus | Osiris or DLS Trainingen have ads?

Neither Aventus | Osiris nor DLS Trainingen shows ads.

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

Aventus | Osiris ships an update every 4 months, and DLS Trainingen every 2 weeks. Most recently, Aventus | Osiris was updated on September 23, 2026 and DLS Trainingen on September 19, 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.*