Ionic.io is a web service for creating and building apps for all major platforms. Creator is a super simple prototyping tool for building real hybrid mobile apps (using Ionic). It takes the pain out of wiring up your app’s architecture and UI from the ground up, by letting you visually build your app with drag-and-drop mobile components and templates.
Ionic.io also comes with tons of tutorials. You will need to create an account to use Ionic.io and it is free for one project.