# AVIOBOOK CONNECT X vs Acron ETHOS EU

The clearest difference is update cadence: AVIOBOOK CONNECT X at every 2 months against Acron ETHOS EU's every 6 months. Acron ETHOS EU's advantage is iOS requirement (15.6 vs 17.0). 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.

AVIOBOOK CONNECT X ships an update every 2 months, Acron ETHOS EU every 6 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | AVIOBOOK CONNECT X | Acron ETHOS EU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 45 MB | 13 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [AvioVision](https://appshunter.io/developer/568400284) | [Aerosim](https://appshunter.io/developer/491766443) |

## What reviewers say

### AVIOBOOK CONNECT X

[App page](https://appshunter.io/ios/app/aviobook-connect-x/id6476919216)

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

**In-app purchases:** none


### Acron ETHOS EU

[App page](https://appshunter.io/ios/app/acron-ethos-eu/id6744337370)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AVIOBOOK CONNECT X free?

AVIOBOOK CONNECT X is free to download, with no in-app purchases.

### Is Acron ETHOS EU free?

Acron ETHOS EU is free to download, with no in-app purchases.

### Do AVIOBOOK CONNECT X or Acron ETHOS EU have ads?

Neither AVIOBOOK CONNECT X nor Acron ETHOS EU shows ads.

### Which is updated more often, AVIOBOOK CONNECT X or Acron ETHOS EU?

AVIOBOOK CONNECT X ships an update every 2 months, and Acron ETHOS EU every 6 months. Most recently, AVIOBOOK CONNECT X was updated on October 30, 2026 and Acron ETHOS EU on October 30, 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.*