Comparison

Gas Detection vs Smell Annotator

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

Head to head
About

Gas Detection

Explore gas and vapor measurement technology with this app. It details Dräger-Tube, Dräger Sensor, and Dräger Chip systems, offering comprehensive listings of tubes and chips with measurement parameters. Learn about portable monitors and access support resources like compatibility charts and how-to videos.

Highlights
  • Gas and vapor measurement technology overview
  • Dräger-Tube, Sensor, and Chip system details
  • Complete listing of Dräger-Tubes and chips
  • Introduction to portable monitors
  • Sensor compatibility chart
  • How-to videos and error code charts
Features
Read full description

The Dräger Gas Detection App provides a general overview of gas and vapor measurement technology. The basic principles of the Dräger-Tube, Dräger Sensor and Dräger Chip Measurement System are described and a complete listing of the Dräger-Tubes and chips are provided with all relevant measurement parameters. In addition, there is an introduction to portable monitors, including electrochemical, catalytic, and infrared sensor technology, as well as a complete list of Dräger sensors and monitors. The support section contains a sensor compatibility chart, how-to videos, error code charts and links to our new customer support pages.

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

Screenshots

Gas Detection3 screens
Smell Annotator3 screens

Verdict

The call

The clearest difference is rating: Gas Detection at 5.0 against Smell Annotator's 1.0. Gas Detection also leads on iOS requirement (12.0 vs 15.0). Smell Annotator's advantage is update cadence (monthly vs every 16 months). On price, ratings volume, 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

Gas Detection holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Gas Detection ships an update every 16 months, Smell Annotator monthly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Gas Detection versus Smell Annotator: the parameters behind the verdict, then further details
ParameterGas DetectionSmell Annotator
PriceFreeFree
Rating5.0 (2 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 16 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size79 MB53 MB
Age rating4+4+
DeveloperDraegerwerk AG & Co. KGaASmartNanotubes Technologies

Customer experience

Gas Detection

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Smell Annotator

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

In-app purchases

None

Gas Detection

No in-app purchases

None

Smell Annotator

No in-app purchases

Questions

Is Gas Detection free?
Gas Detection 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, Gas Detection or Smell Annotator?
Gas Detection is rated higher. Gas Detection averages 5.0 out of 5 from 2 ratings, while Smell Annotator averages 1.0 from 1 ratings.
Do Gas Detection or Smell Annotator have ads?
Neither Gas Detection nor Smell Annotator shows ads.
Which is updated more often, Gas Detection or Smell Annotator?
Gas Detection ships an update every 16 months, and Smell Annotator monthly. Most recently, Gas Detection was updated on October 10, 2026 and Smell Annotator on October 2, 2026.

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