# Smell Annotator vs Scentience

The clearest difference is rating: Scentience at 5.0 against Smell Annotator's 1.0. Scentience also leads on ratings volume (12 vs 1). Smell Annotator's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Scentience holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Scentience has 12 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Smell Annotator | Scentience |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/smell-annotator/id1607528175/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/scentience/id6741092923/reviews)** |
| Number of ratings | 1 | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 53 MB | 1.7 GB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SmartNanotubes Technologies](https://appshunter.io/developer/1607528177) | [Kordel France](https://appshunter.io/developer/1215137099) |

## 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


### Scentience

[App page](https://appshunter.io/ios/app/scentience/id6741092923)

Visualize and interpret olfactory data from specialized devices. This tool offers real-time scent analysis, AI-powered source localization, and device calibration, all while prioritizing user privacy with offline functionality.

**Highlights:** Real-time olfaction data visualization, AI-powered scent source localization, Automatic device calibration, Offline operation for privacy, Multi-device swarming coordination, Chemical compound identification

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

**In-app purchases:** none


## Frequently asked questions

### Is Smell Annotator free?

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

### Is Scentience free?

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

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

Scentience is rated higher. Smell Annotator averages 1.0 out of 5 from 1 ratings, while Scentience averages 5.0 from 12 ratings.

### Do Smell Annotator or Scentience have ads?

Neither Smell Annotator nor Scentience shows ads.

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

Smell Annotator ships an update monthly, and Scentience monthly. Most recently, Smell Annotator was updated on September 14, 2026 and Scentience on September 18, 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.*