Bubble Mania. The ultimate time-waster. Worse even than Pinterest.
Actually, I shouldn't make such a proclamation when, aside from Spider Solitaire, this is the only game I've ever played on my phone. I'm sure there are more intense games that would distract you to the degree that you'd look at the clock, and WOW! Three hours have passed!
But I hope I never try them, because this one was bad enough. I won't try to explain the game - the premise doesn't make sense...something about saving baby birds (?)...but apparently you can spend at least 20 minutes playing it without blinking an eye.
Or at least, I can.