I love playing pinball on my iPad. Its a match made in heaven in my opinion. The 2 most popular pinball apps are Zen Pinball and Pinball Arcade. They both take different approaches to their app. Zen creates tables from scratch and has the advantage of not being limited to real world physics. These tables are only limited by the imagination of the developers. Pinball Arcade, on the other hand, reproduces actual classic pinball tables and does so beautifully. Both apps are highly recommended and a ton of fun! Try the free table and see for yourself.
SnookFan about Zen Pinball