Angry Birds, an application for smartphones such as the iPhone involving a flock of irate wingless birds has dominated the attentions of users this year, according to new figures.
The game topped the chart for paid-for iPhone apps bought from Apple in 2011.
Two of its spin-offs - Angry Birds Seasons and Angry Birds Rio - also featured in the top 10.
The original game sees players catapulting round red birds at various structures in order to get at their green pig nemeses.
Facebook topped the free app downloads on the iPhone, while Twitter, Skype and eBay all featured in the top 10.
Meanwhile, the BBC's iPlayer came top of the iPad free app download chart.
TV catch-up services are proving a hit on the tablet device with ITV Player and 4oD all featuring in the top 10.
Meanwhile, the iPad's top paid-for app was the word processor Pages.
Music recording and producing software GarageBand came in at number two while two Angry Birds games also featured in the top 10.
Top 10 paid-for iPhone apps in 2011
1. Angry Birds
2. WhatsApp Messenger
3. Angry Birds Seasons
4. Cut The Rope
5. Fruit Ninja
6. Angry Birds Rio
7. Doodle Jump
8. Tiny Wings
9. TuneIn Radio Pro
10. Where's Wally? In Hollywood
Top 10 free iPhone apps in 2011
7. Angry Birds Rio Free
8. National Lottery Official App
9. BBC News
10. Bubble Shooter Free
Top 10 paid-for iPad apps in 2011
3. Angry Birds HD
5. Angry Birds Seasons HD
6. Angry Birds Rio HD
8. Fruit Ninja HD
Top 10 free iPad apps in 2011
1. BBC iPlayer
3. Mr Giggle HD Lite
4. ITV Player
5. 4oD Catch Up
6. Mr Giggle 2 HD Lite
9. Angry Birds HD Free