What are some alternatives?
Bubble - Don't hire engineers! Bubble let's you build an app entirely visually
appenguin - Turn the most complex web application or website to into an Android app in minutes, for free!
Android Studio - Android development environment based on IntelliJ IDEA
MIT App Inventor - MIT App Inventor | Explore MIT App Inventor
AppMakr - AppMakr is a browser-based platform designed to make creating your own iPhone app quick and easy.
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.