Unfortunately, most people I know use WhatsApp for personal communications, as a result, I've had to start using it too. However, I'm unsure which is more privacy-oriented for desktop use: WhatsApp Web in a browser or the native application.
I hate WhatsApp so much. I've tried multiple times to stop using it but it's so ubiquitous (at least in Europe) that it's impossible to live life without it. The only way this monopoly could be killed is EU government intervention.
I hear you bro. It's maddening how I have to submit legal documents through fucking whatsapp of all places. I'd ask if I can email them instead, or even better, hand them personally to avoid all the techy bs. They'll look at me like a caveman appeared from the mountains, and tell me "But you're applying for an IT job! Don't tell me you don't use smartphones!".
Sure, ma'am. Sucking zucc's dick means being a developer, wow.
Native application is just a browser wrappen in a nice suit. There's no difference in terms of privacy.