[CA11] Wi-Fish App

Is there a way to increase the font size of the depth and temp displayed? How do you import charts for the map view? I have read you use apple maps but they won't download when connected to the wifi from the Wi-Fish.
Has anyone been able to get it to work in Navionics on an Apple IOS device lately? I had it talking with Navionics last year but this year either some apple update or Navionics but it won't communicate with Navionics. I have many trouble tickets in with Navionics but no luck yet.
Thanks!!!