# CATSsmartscan vs Helios ELS

The clearest difference is iOS requirement: CATSsmartscan at 11.0 against Helios ELS's 14.0. On price, update cadence, 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.

CATSsmartscan ships an update every 9 months, Helios ELS every 11 months. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CATSsmartscan | Helios ELS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 11 months |
| Size | 49 MB | 28 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [C.A.T.S.-Soft GmbH](https://appshunter.io/developer/1081022758) | [Helios Ventilatoren GmbH + Co KG](https://appshunter.io/developer/1553902986) |

## What reviewers say

### CATSsmartscan

[App page](https://appshunter.io/ios/app/catssmartscan/id1446754986)

**In-app purchases:** none


### Helios ELS

[App page](https://appshunter.io/ios/app/helios-els/id6475874347)

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

**In-app purchases:** none


## Frequently asked questions

### Is CATSsmartscan free?

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

### Is Helios ELS free?

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

### Do CATSsmartscan or Helios ELS have ads?

Neither CATSsmartscan nor Helios ELS shows ads.

### Which is updated more often, CATSsmartscan or Helios ELS?

CATSsmartscan ships an update every 9 months, and Helios ELS every 11 months. Most recently, CATSsmartscan was updated on October 20, 2026 and Helios ELS on October 12, 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.*