I downloaded this amazing app on my Iphone called Book Buddy. It is a great way to have your book list on the go. Has a section for wishlist books as well as categories such as Read, Reading, Need to Read, Reviewed. The best feature is that you can add multiple books at once using the multiple bar-code scan.
The free app hold up to 50 books and 5 categories. The paid app is unlimited as is only $4.99. I did go buy the app because I have a lot of books and I like to be organized.
I also use the Blogger App, not as a way of updating but to make sure posts are up on the fly. This is a free app and it has very few glitches. I am also able to flip back and forth between my book blog and my road trip blog.
InstaCollage is another App I use when prepping book photos. I want to start doing the Meme that Icey Books hosts called What`s Next. I would post 3 books and their synopsis and then you guys would vote for what I read. InstaCollage is great for taking individual books and combining them together,
Those are the Apps that I find most helpful when working on Bookish things.