On my Android phone (Samsung S-8+) deleteing all Ring event history is simple enough (though not obvious).
-
Open History
-
Press on an event and hold until circles appear to the left of every event
3.Then go to and press the three verticle dots at the top, right of the screen. “Delete all” appears.
Press that and all historical events will erase
Note: The icon on the Ring app on the home screen will still carry a number of events at first. That will catch up after a couple of minutes.