Works (sometimes) but with bugs
Just recently figured out that one reason tha alarm was not launching was that the app have to be running when you turn of your phone. Otherwise the back-up alarm is shown as a alert but only I text, I have never heard the backup tune playing. But often the alarm is not run at all so I always have to have another clock set also. You have to start the night mode and then turn it off to see the settings icon, took me a while to figure that out as well. Not completely dissatisfied, sometimes you need an extra sleeping morning to fully recover but it would be novice to be able to rely on solely on this app.