@node @dew_the_dew @Darb @Bloomfer @errante @bot For starters, if it’s not open source, you can’t trust it. There are other factors, but this is the foundation.
As far as user tracking, any software can do that. The extent which they can do that depends on their sandbox.
Desktop apps have basically no sandbox. Mobile apps need to request permission to do certain things like read your contacts and files, enforced at the OS level. Websites have similar restrictions