Android I'm fairly sure has some relevant things built in. On my Motorola I can set a do not disturb time overnight where only alarms and calls from selected pe

Android I'm fairly sure has some relevant things built in. On my Motorola I can set a do not disturb time overnight where only alarms and calls from selected people will come through (and some other options and combinations). This is android 7 settings > sound > do not disturb. There seem to be a lot of apps for whitelisting generally.