# Instrument Classification vs Sensor

The clearest difference is ads: Sensor at none against Instrument Classification's shown. Instrument Classification's advantage is iOS requirement (15.8.3 vs 18.0). 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.

## The numbers

| Metric | Instrument Classification | Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Size | 43 MB | 30 MB |
| Requires iOS | **15.8.3** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Yerim Lab LLC](https://appshunter.io/developer/6776811924) |

## What reviewers say

### Instrument Classification

[App page](https://appshunter.io/ios/app/instrument-classification/id6749178763)

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

**In-app purchases:** none


### Sensor

[App page](https://appshunter.io/ios/app/sensor-stream/id6783206955)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Instrument Classification free?

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

### Is Sensor free?

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

### Do Instrument Classification or Sensor have ads?

Instrument Classification shows ads; Sensor does not.

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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.*