Welcome to the Wyze User Community Forum @lonetiger! 
Not much info to go on with a one word post. But I will try to name that tune in one word…
This topic is for information on how to get the app to restart all cams with the press of a button.
If you are looking for an App Lock feature, that feature has already been requested. you can find that Wishlist request by following the link, voting at the top, dropping some like 
hearts on posts, and adding your own post in reply at the bottom.