I haven't looked lately but I didn't find one when I did. I just go into settings and do it badaboom badabing done, however since the update I just leave the phone on 4g now and the battery seems no worse for wear. Left the house at 530 am now at 60%
Just downloaded it. It saves a few steps. It takes you right to the screen in settings where you switch it. It's a little quicker than going through the settings menu, but not much. I'm lazy, I'll use it.