# Smell Annotator vs Normal PD

The clearest difference is iOS requirement: Normal PD at 13.0 against Smell Annotator's 15.0. 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.

## The numbers

| Metric | Smell Annotator | Normal PD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/smell-annotator/id1607528175/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | — |
| Size | 53 MB | 19 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SmartNanotubes Technologies](https://appshunter.io/developer/1607528177) | [Town Of Normal](https://appshunter.io/developer/1666341442) |

## What reviewers say

### Smell Annotator

[App page](https://appshunter.io/ios/app/smell-annotator/id1607528175)

This application enables machines to digitally sense and analyze smells using nanomaterial-based technology. It allows users to view, annotate, and recognize smell measurements in real-time, functioning as part of a developer kit.

**Highlights:** Smell recognition, Smell digitalization and annotation, Saving and loading measurements, Real-time measurement visualization, Offline data collection, Graph synchronization

**Features:** Vision Pro support

**In-app purchases:** none


### Normal PD

[App page](https://appshunter.io/ios/app/normal-pd/id1666341440)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smell Annotator free?

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

### Is Normal PD free?

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

### Do Smell Annotator or Normal PD have ads?

Neither Smell Annotator nor Normal PD 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.*