Apple releases a new iAD Gallery app; it features the iAD campaigns from some of the Worlds best brands and their advertising agencies. It gives the easy access to selection of fun and informative ads that you want. The app is free of cost.
Hit the link from you iOS device to download the app for free
http://developer.apple.com/iad/
http://itunes.apple.com/us/app/iad-gallery/id424733624?mt=8