Kiosk App - Auto-Update update on an android device (Samsung Galaxy S2). A I am waiting for the app to download and install. Is there a way I can force this to take place without user interaction.

I was thinking about the following :


Killing the app (from another app)
Reopening the app after 1 hour (from another app)


Is this going to work? Can I garantee that the update will have taken place?

Thanks in advance!

P.S
I have 700 devices so this has to be automated. I have waited overnight for the app to install while the app was running and it didnt happen. I am open to any suggestions.
Is the app on the play store? 

If yes, it should push out an update without user intervention provided the setting to 'Auto-update apps' is set, depending on preference of either Wifi or using Mobile data. See below: