Apple just delivered the 25 billionth iOS app last Saturday, and as a follow-up to the event the company has listed the top 25 most popular free and paid apps for the iPad and the iPhone. Perhaps unsurprisingly, the Angry Birds franchise dominates the lists, taking three of the top ten paid app slots for both mobile devices — and laying claim to the title of most popular paid iPhone app of all time as well. On the free side, Facebook continues to sit atop the iPhone list, while Netflix has worked its way into the top ten for both devices as well. To see if there are any apps that you've been missing, you can check out the lists in their entirety at the App Store itself.