The 'Top Gear: Where's Stig?' game, also a new entry, has gone in at number eight.
Sky takes second spot with its just-released Sky Go app, which allows Sky pay-TV customers to access TV content via their iPhone.
Next comes Google+, which gives people access to the social network launched by Google last month.
Last week's number one, O2 Priority Moments, has fallen 11 places, but Facebook and ITV Player remain close to the top.
The chart is powered by analytics app developed by with non-commercial branded apps removed.