Hi, I'm Remi from Fusetools. This interview with our CEO Anders does a good job of summarizing what we're about: https://www.forbes.com/sites/julianmitchell/2017/06/29/this-... (feel free to skip past the intro about why app development is A Thing :)

TL;DR We're primarily about being able to create cool stuff in less time (cross-platform is just a side-effect of that). A lot of what we build comes down to creating good workflows for going from idea to the final product, and to find the right level of abstraction so that you can work very quickly (staying focused on the real job rather than boilerplate and glue code) without giving up control and being sandboxed.