Pictures Details and splash screen

I have a few problems, the first is that when you load the splash screen, then appears a white image and then loads the contents of my app.

And the other thing is that the images are slow to load or do not load complete, as you can fix this? For example an iPhone 5s fast loading, but in some cases delay or androids load.

1st. Try this inside $ionicPlatform.ready:

$timeout(function() {
navigator.splashscreen.hide();
},400);

with this the app should be fully loaded when hiding splashscreen. Dont forget to set in config.xml:

<preference name="AutoHideSplashScreen" value="false" />

2nd. how big are your pictures?

Thanks for your help, sorry about the pictures really do not, are quite small but when loading for the first time, but I do not carry a full load to the second fast and complete. It is rare