Alarmy offers multiple alarm modes to force you out of bed. When you add an alarm, choose your desired method from "Alarm off method". For example, if you choose "Take a picture", you must take a picture that matches a preset picture to dismiss the alarm. If the alarm mode is set to "Shake", you must shake the phone a set number of times, and so on.
Alarmy provides "Prevent phone turn-off" and "Prevent app uninstall" options to prevent this problem. You can turn on the options in Settings.
Screen filter apps such as Bluelight Filter may cause this problem. These apps provide an overlay over the phone screen, hence displaying this message. When you see this message, please turn off your filter momentarily. (Please understand that it is Android policy with overlays and is thus unavoidable.)
It is not possible to delete Alarmy if "Prevent app uninstall" option is turned on. Please check it in Setttings!