Apple has revealed the all time top apps for iPad and iPhone as part of the countdown to the 10 billionth app download. The top apps for iPad and iPhone are divided into 4 categories, such as Top Free iPad Apps, Top Free iPhone Apps, Top Paid iPhone Apps and Top Paid iPad Apps. The list of top 10 apps from each category given below.

1. Facebook
2. Pandora
3. Google Mobile App
4. Shazam
5. Movies by Flixster
6. The Weather Channel
7. Google Earth
8. Bump
9. Skype
10. Paper Toss

1. Pandora
2. Google Mobile App
3. Movies by Flixster
4. Google Earth
5. Yelp
6. Fandango Movies
7. Remote
8. iBooks
9. Bible
10. Solitaire

1. Doodle Jump
2. Tap Tap Revenge 3
3. Pocket God
4. Angry Birds
5. Tap Tap Revenge 2.6
6. Bejeweled 2 + Blitz
7. Traffic Rush
8. Tap Tap Revenge Classic
9. AppBox Pro Alarm
10. Flight Control

1. SoundHound
2. StickWars
3. FlightTrack
4. Backbreaker Football
5. Calorie Tracker
6. BlocksClassic
7. iFart Mobile
8. GoodReader for iPad
9. Cro-Mag Rally
10. Ambiance

You can see from the above list Facebook is at the top position in the list of all time top free iPhone Apps. Doodle Jump is at the top position in the list of all time top paid iPhone Apps. Pandora is at the top position in the list of all time top free iPad Apps. SoundHound is at the top position in the list of all time top paid iPad Apps.