Apps similar to VoltBuilder include Ionic Framework, which is free and open source. Other options are Monaca and Capacitor by Ionic. In total there are three Web App Development Tools like VoltBuilder for Mac, Windows, Linux, the web and Android.
Ionic is an open source app development toolkit for building modern, fast, top-quality cross-platform native and Progressive Web Apps from a single codebase with JavaScript and the Web.
Monaca makes the hybrid mobile app development process with PhoneGap/Cordova simpler and stress-free with our comprehensive cloud-powered app development tools and services. Monaca can easily be plugged into your existing workflow.
Japan
An open source native runtime that makes it easy to build cross-platform apps that run equally well on iOS, Android, and the Web.
United States