Whenever some app or service claims to respect your #privacy, check for two things:
1. Is it open-source on both client and server (if applicable) ?2. Is the service itself decentralized in some way (federated, allows self-hosting etc.) ?
Now evaluate everything you use - iPhones, WhatsApp, Telegram, Signal, Gmail etc. using this checklist.
Try to find and use software/services which satisfy both of the above conditions.
I use a #4opens checklist http://hamishcampbell.com/index.php/projects/4opens/ as a step away tool.
To support this server and the OMN project https://opencollective.com/open-media-network