Anonymous story viewing services on Instagram

Hi everyone, lately, I’ve been seeing a lot of services that promise anonymous viewing of Instagram Stories and profiles without logging into an account. A friend of mine is interested in this option because she doesn’t want to leave any viewing traces, but we’re a bit skeptical about whether it actually works reliably and whether it’s safe to enter any personal information there. Has anyone actually used these kinds of platforms? I’m curious do they really provide anonymity?