Nearly 74% of Americans use their inhalers improperly and about one-third of adults with inhalers miss doses. Propeller Health’s FDA-cleared sensors hope to solve this problem. The digital inhaler technology for those with asthma and COPD has a smartphone app linked to sensors on your inhaler which tracks your usage and dosage. In a 2021 study of adults with COPD, researchers found that sensor users needed less rescue medication. And a 2018 study of 224 people with asthma found that emergency room visits and hospital stays dropped with sensor use.