If you’re aged between 18 and 24, you’re probably using YouTube to watch videos, playing social word game Words With Friends and listing to Pandora radio. If you're aged 35 and over Angry Birds might be more your thing.

“Facebook’s popular app is the most active among Android owners 18-24 and 25-34, who both hover at around an 80 percent active reach. Google’s social network Google+ was more popular with those aged 25 and above than with younger users but did not make it into the top 15 most-used apps ranking. YouTube is a popular choice for Android owners with 64 percent of 18-24 year-olds using the app during the month of September.

Angry Birds is more popular with users aged 35-44 than younger generations. In the month of September 24 percent of those aged 35-44 fired up the app while only 22 percent of 18-24 year-olds and 29 percent of 25-34 year-olds battled against those nasty green pigs. Angry Birds was popular with iPhone users too this year. Apple announced that application had topped its list of most popular paid iPhone apps for 2011 during the company’s annual Rewind recap.

Facebook was also extremely popular with iPhone users and grabbed first place in Apple’s top ten free iPhone apps for the year. Pandora Radio, Words With Friends and Twitter were ranked second, third and tenth respectively.  

Mobile Application Reach by Age According to Nielsen:

18-24 Age Group

1. Android Market
2. Facebook
3. Google Search
4. Gmail
5. Google Maps
6. YouTube
7. Pandora Radio
8. Advanced Task Killer Free
9. Words With Friends
10. Angry Birds
11. Quickoffice
12. The Weather Channel
13. Adobe Reader
14. Amazon AppStore
15. Yahoo! Mail

1. Android Market
2. Facebook
3. Gmail
4. Google Maps
5. Google Search
6. YouTube
7. Angry Birds
8. Pandora Radio
9. Quickoffice
10. Advanced Task Killer Free
11. Words With Friends
12. Amazon AppStore
13. Adobe Reader
14. The Weather Channel
15. Yahoo! Mail

1. Android Market
2. Facebook
3. Gmail
4. Google Search
5. Google Maps
6. YouTube
7. Angry Birds
8. Quickoffice
9. Advanced Task Killer Free
10. Amazon AppStore
11. Words With Friends
12. Yahoo! Mail
13. Pandora Radio
14. Adobe Reader
15. The Weather Channel