Should be marked as (2019) and while interesting, Onavo was shut down in Feb 2019 [1]
" Since the acquisition, Onavo was frequently classified as being spyware, as the VPN was used to monetize application usage data collected within an allegedly privacy-focused environment. In August 2018, Facebook pulled Onavo Protect from the iOS App Store due to violations of Apple's policy forbidding apps from collecting data on the usage of other apps. In February 2019, in response to criticism over a Facebook market research program employing similar techniques (including, in particular, being targeted towards teens), Onavo announced that it would sunset the Android version of Protect as well. "