Kairos Pattern for "Opportune" Disclosure in UI

Looking for a pattern or guideline that will present an option to a mobile app user with an affordance to get some user assistance if there is no activity detected after a short time.

I've looked at the Kairos UI pattern, but I am wondering about community thoughts on how a user coming to a mobile UI and then being stuck (yes, I know, but fixing UI isn't option) might be best presented with a personal assistant popup that says" Hey you look like you need some help, try this..."

REF: http://ui-patterns.com/patterns/Kairos