How do I test my game in fullscreen?

How can i test my game in fullscreen on a mobile device? Is there any app that can do that? In chrome i can`t preview on fullscreen.

for android: boat browser, it has a fullscreen option
for ios: i dont know

Export your game and use the Intel XDK. You upload your game, then you can open it fullscreen with their App Preview app for both iOS and Android. A little slower than an instant preview, but it will be fullscreen.

Thanks, i found CoCoonJS. it works very good, instant preview and fullscreen.