Keep a copy of Wikipedia with you. Wherever you go. Open the iPhone App and Articles around you appear. Search, scroll and swipe through one of the most amazing collections of knowledge.
When having opened a lot of pages it can take quite some swipes to go back to the search. Grab all open pages at once by swiping over the edge of your screen left to right and go back to the search instantly.
Find Downloads, Updates and Settings by tapping the language button on the left side of the search bar.