# Sentek Probe Utility vs Norm Vision System

The clearest difference is update cadence: Norm Vision System at every 5 months against Sentek Probe Utility's every 17 months. Sentek Probe Utility's advantage is iOS requirement (13.0 vs 15.6). 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.

Sentek Probe Utility ships an update every 17 months, Norm Vision System every 5 months. The most recent releases landed on August 1, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Sentek Probe Utility | Norm Vision System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 5 months** |
| Size | 6 MB | 91 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Sentek Pty Ltd](https://appshunter.io/developer/1349594833) | [Norm Engineering Pty Ltd](https://appshunter.io/developer/1803331202) |

## What reviewers say

### Sentek Probe Utility

[App page](https://appshunter.io/ios/app/sentek-probe-utility/id1493878280)

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

**In-app purchases:** none


### Norm Vision System

[App page](https://appshunter.io/ios/app/norm-vision-system/id6743525268)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sentek Probe Utility free?

Sentek Probe Utility is free to download, with no in-app purchases.

### Is Norm Vision System free?

Norm Vision System is free to download, with no in-app purchases.

### Do Sentek Probe Utility or Norm Vision System have ads?

Neither Sentek Probe Utility nor Norm Vision System shows ads.

### Which is updated more often, Sentek Probe Utility or Norm Vision System?

Sentek Probe Utility ships an update every 17 months, and Norm Vision System every 5 months. Most recently, Sentek Probe Utility was updated on August 1, 2026 and Norm Vision System on September 5, 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.*