A common problem in alarm apps is that it does not silence the device between set and triggered time. Nap Time Alarm is a great example of how to activate Do Not Disturb mode once alarm is set. Although it's now a full blown countdown or alarm app, the backend uses Firebase authentication and Realtime database to store user's last recorded minutes and seconds. Sign-in to Google account is optional.
- App needs Do Not Disturb access for Android >= 23 Marshmallow
- Source at https://github.com/hilliao/enterprise-solutions/tree/master/NapTimeAlarm
updated privacy policy at http://techsightteam.com/com.dlinkddns.hil.naptimealarm-privacy_policy.html