# KEUCO Sensor vs HTMLViewer Pro+

The clearest difference is price: KEUCO Sensor at Free against HTMLViewer Pro+'s $2.99. KEUCO Sensor also leads on iOS requirement (9.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

KEUCO Sensor is free to download; HTMLViewer Pro+ costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | KEUCO Sensor | HTMLViewer Pro+ |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 35 MB | 3 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KEUCO GmbH & Co. KG](https://appshunter.io/developer/463771710) | [倩 罗](https://appshunter.io/developer/1653510118) |

## What reviewers say

### KEUCO Sensor

[App page](https://appshunter.io/ios/app/keuco-sensor/id1581736605)

**Features:** macOS Compatibility

**In-app purchases:** none


### HTMLViewer Pro+

[App page](https://appshunter.io/ios/app/htmlviewer-pro-plus/id6746694144)

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

**In-app purchases:** none


## Frequently asked questions

### Is KEUCO Sensor free?

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

### Is HTMLViewer Pro+ free?

HTMLViewer Pro+ costs $2.99, with no in-app purchases.

### Do KEUCO Sensor or HTMLViewer Pro+ have ads?

Neither KEUCO Sensor nor HTMLViewer Pro+ shows ads.

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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.*