# RoomAlyzer vs Smell Annotator

The clearest difference is update cadence: Smell Annotator at monthly against RoomAlyzer's every 4 months. On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 1.0 for RoomAlyzer against 1.0 for Smell Annotator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RoomAlyzer ships an update every 4 months, Smell Annotator monthly. The most recent releases landed on June 4, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | RoomAlyzer | Smell Annotator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/roomalyzer/id1603087705/reviews) | [1.0 (1 ratings)](https://appshunter.io/ios/app/smell-annotator/id1607528175/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | Free |
| Size | 15 MB | 53 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IoT Fabrikken](https://appshunter.io/developer/1573581837) | [SmartNanotubes Technologies](https://appshunter.io/developer/1607528177) |

## What reviewers say

### RoomAlyzer

[App page](https://appshunter.io/ios/app/roomalyzer/id1603087705)

Monitor your indoor climate with this app, which displays data from your RoomAlyzer sensor. Track temperature, humidity, CO2, VOCs, noise, and light levels. Receive analyses, statistics, warnings, and a mould prognosis.

**Highlights:** Indoor climate data overview, Temperature and humidity tracking, CO2, VOC, noise, and light level monitoring, Mould prognosis, Sensor usage statistics, Warnings and notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is RoomAlyzer free?

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

### Is Smell Annotator free?

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

### Which has better reviews, RoomAlyzer or Smell Annotator?

RoomAlyzer and Smell Annotator are both rated 1.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do RoomAlyzer or Smell Annotator have ads?

Neither RoomAlyzer nor Smell Annotator shows ads.

### Which is updated more often, RoomAlyzer or Smell Annotator?

RoomAlyzer ships an update every 4 months, and Smell Annotator monthly. Most recently, RoomAlyzer was updated on June 4, 2026 and Smell Annotator on September 14, 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.*