Make the app a UWP (Windows 10 Universal Windows Platform) app, so it will work on Lumia 950 with Continuum with a desktop-like experience.
need a win 10 mobile app version!
Andrew Macaulay commented
Having a UWP version for the desktop is only half the answer - need the UWP app to be truly universal, with support on Windows 10 Mobile (with Continuum) and maybe even Xbox, Surface Hub and HoloLens.
A new UWP App is now out in the store, but it does't work on phones. Why?
Definitely would love to have the windows 10 version on Mobile along with continuum support! Please make it happen sooner than later. :D
UWP version of Nextgen Reader needed!
And sync settings across multiple computers (and mobile) :
look also this on the Nextgen Reader - WP8 UserVoice :