Ask HN: Legal Concerns for Indie App?

Hello everyone!

Say you make an indie app and you charge $1.99\mo for the service it provides.

What are the legal measures you should take for it? LLC? “Business” Auth0 and Stripe accounts as opposed to ones made with your personal email? Terms and Conditions?

The goal is not a startup but a small indie app with a user base of < 500

Thanks!