Ruby Hail is fast-by-design Rack-based nano-framework. It provides generator and helper to quickly create Rack-based web-apps. You have options to make plain html-based app with basic templates. You can chain htmls and utilize ruby string interpolation. You can generate simple json API with authentication. Or you can go with SPA (single-page app). It uses Vue.js for UI because it shares fast-by-design philosophy and very similar to AngularJS 1. In all cases you have database (sqlite by default) available out of the box.