A round-up of what's new in the App Store, Google Play, BlackBerry World and Windows Phone Store
Amazing Alex app storms charts
The Amazing Alex app has surged to the top of the paid iPad chart
A whizz-kid character with boundless imagination has taken the app charts by storm this week.
The Amazing Alex app shot to the top of the paid iPad chart and came second only to the WhatsApp Messenger in the paid iPhone list.
Made by Angry Birds designers Rovio, Amazing Alex is about a boy who uses household items and toys to create Rube Goldberg machines.
With the Olympics just around the corner, the BBC's app dedicated to the Games also performed well, beaten only by Angry Birds Seasons at the top of the free iPhone chart.
The official Olympics results app, created by Games organisers Locog, was in at number five in the free iPad list.
Countries Quiz, which challenges gamers to match national flags with their country's name, topped the free iPad chart.