This app is amazing! I only have two problems:
The way (or lack thereof) it handles multiple attacks leaves much to be desired. It doesnt account for BAB 6+ having an additional BAB at -5, so once BAB hits 6 you have to track other attacks separately using the attack macros. The macros are easy to make, though, so its not a huge deal. Plus it automatically adds BAB and base saves for multiclassed characters!
The other problem is with the character spell book, which doesnt automatically track used spell slots (e.g. I can have two spells prepared and two slots available, but casting a spell doesnt actually spend a spell slot). That just means I have to click to cast a prepared spell and click again to track my spell slots. Not a big deal, but it also doesnt track spell slots for 0 level spells. Fine for pathfinder, but it doesnt do it on the 3.5 sheet either.
Overall, this app is amazing and a HUGE convenience. GUI is A+, glad to have the full basic spell book and equipment list, and I love how you can make your own things (spells, feats, traits, classes, etc.) and save them.