That's not true - you're meant to test your smoke alarm weekly.
Also false alarms can be the smoke detector acting correctly to the presence of smoke, eg. Burnt toast.
In this case the ability to remotely check the alarm status from a self check, or to remotely snooze a false alarm while clearing the smoke can be very handy
OK so you find it easier to find your phone open the app and then press that button. I find it easier to press the button on the unit. I also find it easier to touch a £10 device with food covered/wet fingers whilst cooking than to get out a £300 smart phone and touch that with food covered or wet fingers.
In this case the ability to remotely check the alarm status from a self check, or to remotely snooze a false alarm while clearing the smoke can be very handy