Sergiy -
That may answer Julian's question but Frank's question is still outstanding. We too experience the problem on our Android app that when an update is pushed out, the app shows a black screen with no indication that anything is happening. it appears to the user that the app is locked up. The auto update lasts anywhere from 20 to 40 seconds - long enough for a user to get fed up. After the updates are processed, then the splash screen displays followed shortly by the app.
However, on iOS devices, it shows a nice message in the center of the splash screen. We need a message showing on Android that gives the same indication that something is happening. We don't necessarily need to control it, but we do need it to show on the screen to the app user. Since the auto update code is attached to our apps in order to facilitate the update process, you, Appery, do control it and can make it show a message before our app code is initialized.
I've attached a screen shot of both our iOS and Android app during the loading of an auto update push. You'll see the loading message on iOS on the left and the black screen shown to users on Android on the right.