Regarding downloads, Glide Apps and Classic Apps never requires a user to download to be able to use it, they can just use it on the browser with the link you share to them.
Apps (Pages) have the no sign-in option. Classic Apps do not.
Selecting Optional Sign-in would give you the same effect, but you will not be able to hide the sign in option in the side menu if it’s visible. You could however, change to a whitelisted table of approved users. So ultimately, the app would be public to all visitors, but if anyone attempts to sign in, you could have 1 or 2 users who are whitelisted to get passed the sign in.
Honestly, you would probably have a better experience using Apps (Pages) instead of Classic Apps.