Comparison

Smell Annotator vs Scentience

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Smell Annotator

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
Read full description

Today, machines can see, hear, feel, and even learn. But smell? Not really! Our nanomaterial-based technology enables machines to use an electronic sense of smell. Smell Annotator app is an AI-based software program which is used to view, annotate and analyze smell measurements taken with the Smell Inspector and to recognize annotated smells in real time. The Smell Annotator app is a part of the Smell Inspector Developer Kit. The Smell Annotator gives you access to the smell sensors of your Smell Inspector developer kit. APP FEATURES * Smell recognition [NEW] * Smell digitalization and annotation * Saving measurements and loading saved data * Visualization of real-time and saved measurements with temperature and humidity data * Collect measurement data with or without internet access * Sync graphs for better clarity of data SENSORS * 4 Smell iX16 detector chips * Temperature sensor * Humidity sensor SMELL INSPECTOR The Smell Inspector is a ready-to-use device for anyone and a developer kit. It is suitable for testing and exploring different smell-related applications in the fields of product quality, safety & security, life & care, air quality, and many others. It has four Smell iX 16 detector chips inside, can be connected to a PC, tablet, or smartphone, and can be operated with Smell Annotator software. USER MANUAL For more information about how to use the App and the Smell Inspector device, go to: http://smart-nanotubes.com/downloads/ ABOUT US Along with a great community of industry experts and researchers, SmartNanotubes Technologies shares the vision of digital smell recognition. Our goal is to enable digital smell recognition in a fast and easy way and help our customers to develop product solutions for their own smell and gas detection applications. Visit us at: http://smart-nanotubes.com

About

Scentience

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
Read full description

The Scentience app is a visualization tool intended to be used as a companion with the Scentience olfaction devices for olfactory robotics. The app allows an iPhone or iPad to simply connect to each device wirelessly through Bluetooth. Just open the app with a Scentience device activated and pairing will occur automatically. Onboard the app is an Olfaction-Vision-Language Model (OVLM) that runs completely on the device. Privacy is of paramount importance to Scentience, so no internet, LTE, or other data connection is required to use and operate the main features of the app. Below are a few features the app provides: - Guidance on how to use Scentience devices. - Automatic calibration of Scentience devices and diagnostics monitoring. - Real-time visualization and interpretation of olfaction data. - An Olfaction-Vision-Language AI Model (OVLM) for locating the source from where detected compounds are emitted. - An Olfaction-Vision-Language-Action AI Model (OVLAM) for enabling Scentience devices to navigate by scent. - Over-the-air firmware updates for Scentience devices through Bluetooth connection. - Information on chemical compounds detected in the air and what causes their presence. - Coordination of multi-device swarming for enhanced scent localization. - Contextualization of detected compounds with local weather data. - Interfacing with third party olfaction sensors. - Export of all data for offline lab use. - Olfactory fingerprinting.

Screenshots

Smell Annotator3 screens
Scentience4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
Smell Annotator versus Scentience: the parameters behind the verdict, then further details
ParameterSmell AnnotatorScentience
PriceFreeFree
Rating1.0 (1 ratings)5.0 (12 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings112 — better
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size53 MB1.7 GB
Age rating4+4+
DeveloperSmartNanotubes TechnologiesKordel France

Customer experience

Smell Annotator

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Scentience

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Smell Annotator

No in-app purchases

None

Scentience

No in-app purchases

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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