Olfaction is the least charted of the human senses. Join d2smell and help map it: not in a laboratory, but in the air you actually breathe.
SMELLiT asks what you smell, four times a day. It is the research app of d2smell, an international collaboration of four labs. The project is funded by the European Research Council and studies what people actually smell in everyday life. Every answer you send is something no laboratory could have produced.
WHAT YOU DO
At random times within your waking hours, you get a notification. You have 15 minutes to open it. Then answer a few short questions about what you’re smelling right now: describe it, rate it, say where you are and take a quick photo without people in it. Smelling nothing? We still want to hear from you!
The times are random on purpose. The smells you notice when you go looking for them are not the smells that make up our daily life.
The study is 40 questionnaires, spread over about 10 days (longer if you miss some).
WHAT YOU GET
Get paid with a gift card by email, with a bonus for finishing all 40. You can also waive the payment as a donation to science. You can stop at any time.
When you have completed all 40, you will see your own smell story. There are no right answers, so trying too hard will actually hurt your results. Be yourself, and you will find your true nose.
WHO CAN TAKE PART
Adults with a normal sense of smell, using one phone for the whole study. You sign up with your mobile number. Recruitment is open in selected countries, and the app tells you if yours is not one of them.
YOUR DATA
The study is approved by the Weizmann Institute of Science Institutional Review Board. You read and accept a consent statement before anything is collected. No ads and no ad tracking. More in our privacy policy.
Join d2smell, and use your nose to help discover what the nose knows it knows.
It has never counted a questionnaire I did, even after doing it several times
Can’t sign up!
Hurdunayo19
Can’t sign up at all…Why is it happening
🤬🤬🤬🤬🤬🤬
Annomymous0000
THIS APP IS NOT WORTH IT WHY BECAUSE EVERY TIME YOU GDT A NOTIFICATION FOR A SURVEY YOU GET KICKED OUT AND YOU HAVE TO LOGIN IN WITH YOUR PHONE NUMBER AND VERIFY YOUR NUMBER TO LOGIN IN!!!!!!! IS THIS GOING TO BE EVERY-TIME I ANSWER A NOTIFICATION???? FOR THIS I HAD TO CANCEL THE EXPERIMENT AND MY ACCOUNT
Thank you for being part of SMELLiT. This is a big update.
RATING WHAT YOU SMELL
The rating scales have been redesigned. Rather than choosing from a fixed set of steps, you can now place your answer anywhere along a smooth scale. It is a more natural way to say "somewhere between these two", and it gives the research a far more precise signal.
TAKING A PHOTO
The photo step has been rebuilt. The camera now stays oriented with your phone, so a picture taken sideways is saved the way you actually held it, and switching between the front and rear lenses is quicker.
YOUR LANGUAGE
SMELLiT now speaks 13 languages. Arabic reads right to left throughout. You can change language at any time in Settings, and during setup you can now step back to the language picker instead of starting over.
GETTING IN TOUCH
There is a Contact us page inside the app. Write to us directly, attach a photo if it helps explain something, and follow the reply without leaving SMELLiT.
READING COMFORTABLY
Every screen has been checked at large text sizes. Nothing overlaps, nothing is cut off, and buttons stay reachable however you have your display set.
REMINDERS
Notification timing is more reliable, particularly around midnight and when traveling between time zones.
ALSO IN THIS RELEASE
International phone numbers are handled correctly whether typed or pasted, and in any digit system. Offline and connection messages are clearer. Plus a long list of smaller fixes and a good deal of polish throughout.
Version 6.5.2
The developer, Weizmann Institute of Science, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
Contact Info
User Content
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Weizmann Institute of Science
Size
74.7 MB
Category
Lifestyle
Compatibility
Requires iOS 15.0 or later.
iPhone Requires iOS 15.0 or later.
iPad Requires iPadOS 15.0 or later.
iPod touch Requires iOS 15.0 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.