Hi,
Olivia Developer here 
The data i collect is to make application experience better, also i don’t sell this data anywhere, as there is no way this data could be useful for any purpose. It took more than a year to make Olivia how it looks today. I have reasons why i need the information about the users who are using olivia, specially i want know how much time people spend using my app, this i put there so i can see if people are interested and using this app. i received few bucks in donation while i see 5k plus users in metrics. to make communication much better now Olivia has a connect to developer option where users can directly message me and tell me the issues they are facing if they are lazy to open an issue in github for any reason.