NN81 As long as your project works fine in the Chrome browser, it will work as fine in node webkit since both are the same thing.
And concerning APK, you are not forced to use 3rd party sevices, in fact you can build your apks by your own locally ( without the need of internet ), from the index.html to .apk via cordova.
Tell me if your're interested so I can explain how ( it's a long process, but as soon as you finish setting up things, you get to build apks in a matter of seconds, so it's worth the effort).
I've tested before and it worked blazingly fast on my android device.