# Sensors Toolbox vs NDT Helper

The clearest difference is ads: NDT Helper at none against Sensors Toolbox's shown. NDT Helper also leads on update cadence (weekly vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sensors Toolbox ships an update every 7 months, NDT Helper weekly. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Sensors Toolbox | NDT Helper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (134 ratings)](https://appshunter.io/ios/app/sensors-toolbox-multitool/id1383687190/reviews)** | — |
| Number of ratings | **134** | — |
| Positive reviews | 52.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 17 MB | 27 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Neal](https://appshunter.io/developer/1102865152) | [EDISON BOTOR](https://appshunter.io/developer/1790989988) |

## What reviewers say

### Sensors Toolbox

[App page](https://appshunter.io/ios/app/sensors-toolbox-multitool/id1383687190)

Access and visualize data from all your smartphone's sensors in real time. Collect information from accelerometers, gyroscopes, GPS, barometers, and more, then convert it into easy-to-read graphs. This app offers a clean, intuitive interface for comprehensive sensor analysis.

**Highlights:** Real-time sensor data collection, Accelerometer, gyroscope, GPS, Barometer, decibel meter, metal detector, Compass functionality, Intuitive graph visualization, User-friendly interface

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

**In-app purchases:** none


### NDT Helper

[App page](https://appshunter.io/ios/app/ndt-helper/id6758745296)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sensors Toolbox free?

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

### Is NDT Helper free?

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

### Do Sensors Toolbox or NDT Helper have ads?

Sensors Toolbox shows ads; NDT Helper does not.

### Which is updated more often, Sensors Toolbox or NDT Helper?

Sensors Toolbox ships an update every 7 months, and NDT Helper weekly. Most recently, Sensors Toolbox was updated on October 16, 2026 and NDT Helper on October 17, 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.*