How often does one wish to create a PDF directly from one or more Camera Role images without having to load some massive app that is an over-kill for the simple task involved? Frequently, for me, anyway. This app does just that, and does it very well. If you are willing to put up with advertisements that don’t really get in the way of what you want to do, then you can use it without needing to pay anything, but I recommend paying its small purchase price as a way of rewarding the publisher for not jumping on the bandwagon of wanting to charge excessively or - worse - require a periodic subscription. Congratulations to the publisher.