I've seen in a couple of posts (
such as this one) which asks if there is any way to close down an interstitial ad after some timeout (the post indicates "no"), or
this one which asks if there's a configuration option on the AdMob dashboard to achieve the latter (the answer is ambiguous).
The reason I ask is that we have an app and we'd like to display a full page ad when the app is started. However, because it's a security app, it's important not to have an ad showing for an indefinite interval before proceeding to the app's main screen. All i know at the moment is that when I display an interstitial app in test mode, it takes control from the launching application until it's explicitly dismissed by user intervention.
So, in simple terms, can someone give me a definitive answer as to whether an interstitial app can be shown for a fixed interval and then automatically closed whether programmatically or through some configuration option? I can understand having a minimum display interval (so rogue developers can't create fraudulent ad 'ticks' - although one could get around that with something as simple as a button pressing robot or a trained parrot) but no timeout whatever seems to be an unlikely design decision.