I've had to modify the rating recently...see below. The app does what it is supposed to do. Since that is what I expect, it meets my expectations and rates three stars. Disappointment in an app will lose it stars and being pleasantly surprised will earn added stars. Added an Amazon Smart Thermostat to my home and when I try to work with the schedule in the Android version of the Alexa app the app crashes. This is only a problem on my Android phone. When I use the IOS version on my iPad it works