Why does your web page not explain what the app does and how it works, like with examples or something, anything, that describes what I would be signing up for?

Why does your web page not explain what the app does and how it works, like with examples or something, anything, that describes what I would be signing up for? Can I download this directly without signing into Google? I'm not a big Google or big tech supporter. Also why does the front page of your app not explain precisely how it works and what it does? All it promises is an awesome black box that "helps". What does it even do exactly? Writing an increasingly complex "how it works section", like Fastmail had when I signed up or that great comic on cryptography, would be appropriate.