MyCHIPs mobile application

A user interface for a digital payment system. The specification is posted here:

https://github.com/gotchoices/MyCHIPs/blob/master/doc/Project/MyCHIPs_Mobile.md

Prefer a JavaScript based framework of some kind if possible. Must be targeted to both iPhone and Android. Possibilities include React Native, NativeScript, Angular. Also open to Flutter under certain circumstances.