For example, how do I know that the Samsung calendar app is any better than the g calendar app? Is the only way to go full open source (I’d prefer this, yes).
Also, should we stop using things like the default photo gallery? I have a feeling they steal data from that as well.
I know this is more phone related but I don’t have this issue on my pc since I mostly use linux and open source software.
Use the app Brokada 5 or the paid one Brokada 6. I use the free version, tells you if an app has trackers and what they are, blocks bad ones.