# Trial vs Omaha System Reference II

The clearest difference is update cadence: Omaha System Reference II at weekly against Trial's every 4 months. 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.

Trial ships an update every 4 months, Omaha System Reference II weekly. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Trial | Omaha System Reference II |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 55 MB | 18 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [everywhereIM BV](https://appshunter.io/developer/1531113052) | [Ecare Innovatie B.V.](https://appshunter.io/developer/1267905240) |

## What reviewers say

### Trial

[App page](https://appshunter.io/ios/app/trial-finder/id1151379825)

**In-app purchases:** none


### Omaha System Reference II

[App page](https://appshunter.io/ios/app/omaha-system-reference-ii/id1450603395)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trial free?

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

### Is Omaha System Reference II free?

Omaha System Reference II is free to download, with no in-app purchases.

### Do Trial or Omaha System Reference II have ads?

Neither Trial nor Omaha System Reference II shows ads.

### Which is updated more often, Trial or Omaha System Reference II?

Trial ships an update every 4 months, and Omaha System Reference II weekly. Most recently, Trial was updated on October 4, 2026 and Omaha System Reference II on October 25, 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.*