Ask HN: Alternatives to app.domain.com

Hosting a marketing site on a different platform to an app forces the use of sub-domains to direct the user to the right place. (domain.com/dashboard is replace by app.domain.com/dashboard, for example)

We're not limited to using `app` for the sub-domain

A single function app could use things like: email.domain.com /Email provider trade.domain.com /Stock trading wallet.domain.com /Coin wallet

Have you seen any creative or fun names given to the sub-domain?