The u-Smell-it App, developed by U-SMELL-IT LLC, is designed to be used alongside u-Smell-it scent cards to evaluate your sense of smell quickly and effortlessly. By scanning the unique QR code on the card using the app's camera, users can scratch and smell various scent windows on the card. The app then prompts users to select the most fitting scent option from common choices like vanilla, mint, or strawberry.

After the user makes their selections, the app calculates the results to determine whether the individual's ability to smell falls within the normal range or indicates a potential loss of smell, known as anosmia. It's essential to note that the test results are not equivalent to a medical diagnosis, and any medical decisions should not be solely based on these outcomes. Due to the limited range of scents in the test, individuals with a partial loss of smell may not be accurately identified, leading to possible false-negative results.