I want to gather basic telemetry in my app (ex: which buttons are pressed, how long someone stays on certain pages, etc). Do I need to ask for a users permission to do this, or give them a way to opt out of it, if the data that is being collected includes no personal information at all. All it does is send the name of a metric (ex. ms_user_stayed_on_page) and sometimes a numeric value (ex. 20000 [milliseconds]). The data is then aggregated and averaged or summed up for all users, to be able to graph whats happening in the app for each minute.