I think it turns itself off after losing the WiFi signal. Works fine as long as I stay in the house. But I did have to start it again a few time today. Could be because of lost signal. Good ting in my book. Then You can Keep Alive when You need it and not have to worry about it when leaving home etc. :D
App has been working for me. WiFi remains on with screen off and I was able to get downloads done without taking a bite out of my data package. Then again, the 15GB share package should last me and my less than 1GB a month wife anyway.