What does the "Aha" app do?

Having seen some reference to the "Aha" iPhone app here on the forum, I downloaded and installed it on my iPhone X before I got my 2019 Touring. Occasionally, while I'm in the car with CarPlay running, I see the phone spontaneously load the Aha app. However, I've never understood what the function of this app is. Does anyone know how CarPlay or STARLINK interacts with Aha?