# ELS4 Mobile Preview vs Inventra

The clearest difference is update cadence: Inventra at every 3 days against ELS4 Mobile Preview's monthly. ELS4 Mobile Preview's advantage is iOS requirement (11 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.

ELS4 Mobile Preview ships an update monthly, Inventra every 3 days. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ELS4 Mobile Preview | Inventra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Size | 81 MB | 4 MB |
| Requires iOS | **11** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SSE Software GmbH](https://appshunter.io/developer/382391822) | [Burhan Melih Katmer](https://appshunter.io/developer/6785689060) |

## What reviewers say

### ELS4 Mobile Preview

[App page](https://appshunter.io/ios/app/els4-mobile-preview/id1635321886)

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

**In-app purchases:** none


### Inventra

[App page](https://appshunter.io/ios/app/inventra/id6787284457)

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

**In-app purchases:** none


## Frequently asked questions

### Is ELS4 Mobile Preview free?

ELS4 Mobile Preview is free to download, with no in-app purchases.

### Is Inventra free?

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

### Do ELS4 Mobile Preview or Inventra have ads?

Neither ELS4 Mobile Preview nor Inventra shows ads.

### Which is updated more often, ELS4 Mobile Preview or Inventra?

ELS4 Mobile Preview ships an update monthly, and Inventra every 3 days. Most recently, ELS4 Mobile Preview was updated on October 15, 2026 and Inventra on October 24, 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.*