What are some alternatives?
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
appenguin - Turn the most complex web application or website to into an Android app in minutes, for free!
Webflow - Build dynamic, responsive websites in your browser. Launch with a click. Or export your squeaky-clean code to host wherever you'd like. Discover the professional website builder made for designers.
MIT App Inventor - MIT App Inventor | Explore MIT App Inventor
Zoho Creator - Create custom apps for your unique business needs.
AppMakr - AppMakr is a browser-based platform designed to make creating your own iPhone app quick and easy.