M-ONGO, The Maps4pilots app is free! Only if you liked the sample area would you pay to buy the different areas.The pilots Atlas is an atlas with too much information to be really useful except for the odd PA. The Maps4pilots app does not use the best features that an ipad app could offer, but if you liked the book version then its the first step in getting it in a digital format. And I have been told that they will add further functionality, features and areas in the future.