Knowing when and how often you’re using your inhaler can help you understand how in control you are of your breathing and how to avoid things that make it difficult to breathe. By knowing what causes your symptoms, you can start avoiding those things, so you have fewer symptoms and feel better.

The Propeller sensors fit onto your inhalers. When you take your medication, the sensor records the date and time of that event.

The sensors then send that information to your smartphone or tablet using Bluetooth (yes, the same thing that connects your smartphone or tablet to wireless headphones or to the hands-free phone option in your car).

If you don’t have sensors, you can still track your medication use through the app. Check out this article if you’re not sure how to do that.