I donnot like any lisp implemented by Java, very bad taste of developer already.
As a language it is tiny and easy to understand. It can interface to C or Java and Android. It also has a built-in prolog like system. I like many of the choices made by the creator "Alexander Burger".
It starts a node-red server on the device, and uses cordova to host the webview.
I'm in the process of adding an ag-grid node so you can do complex UIs in the dev environment on the phone/tablet.