[Freeswitch-users] Connecting to FS from a mobile app

Guys, Has anyone done that? I currently have WebRTC clients connecting to FS from Chrome and/or Firefox but I now need to do it from my mobile apps (Android and iOS). Any recommendation on how to do it? I use JsSip in the browsers. Any way to make a JS library like that to work from an app? If not, any other suggestions? WebRTC vs. SIP? WebRTC with SIP vs WebRTC with Verto? I apologize if this topic is not about Freeswitch's own functionality but I thought people would b interested and wanted to pick this group's brain.