ITV Player, the free, seven-day catch-up service from the UK's biggest commercial broadcaster, was released at the end of June. It topped the chart last week, but has dropped to second place this week.
The Open Championship 2011 app is unusual for topping the chart even before the golf tournament, which starts tomorrow, has begun. Once play starts, the app will offer a live video stream from holes 14, 15 and 16.
The National Lottery app has made a four-week climb to third place, while Domino's Pizza looks almost ready to drop out, after falling seven places to number 15.
The chart is powered by analytics app developed by with non-commercial branded apps removed.