# Sensors Toolbox vs Key

The clearest difference is ads: Key at none against Sensors Toolbox's shown. Key also leads on iOS requirement (13.0 vs 15.0). Sensors Toolbox's advantage is update cadence (every 7 months vs every 21 months). On price, 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.

Sensors Toolbox ships an update every 7 months, Key every 21 months. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Sensors Toolbox | Key |
| --- | --- | --- |
| 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** | Every 21 months |
| Monetization | Ad-supported | — |
| Size | 17 MB | 1 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Neal](https://appshunter.io/developer/1102865152) | [Paul Barnes](https://appshunter.io/developer/1159692658) |

## 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


### Key

[App page](https://appshunter.io/ios/app/key-info/id1523681669)

**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 Key free?

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

### Do Sensors Toolbox or Key have ads?

Sensors Toolbox shows ads; Key does not.

### Which is updated more often, Sensors Toolbox or Key?

Sensors Toolbox ships an update every 7 months, and Key every 21 months. Most recently, Sensors Toolbox was updated on October 16, 2026 and Key on October 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.*