Hi there, as someone who is writing his master thesis on the privacy of fee vpns. I cannot recommend a single one. By that I mean the ones that advertise themselves as being a mainly free vpn. I have not had a look at privado in specific, but would highly recommend sticking to Proton. Their vpn is also fairly priced if you ask me.

Addtionally, if you want to quickly check out an app to see if they use excessive amounts of permissions(based on manifest file), and the implemented trackers they have you can use Exodus Privacy Tool; https://reports.exodus-privacy.eu.org/en/reports/io.privado.android/latest/