Good app, but it doesnt sync on multiple devices

The app works well on my iPhone and iPad 2. I wish I had known before I bought it that it doesnt back up and it cant sync between devices. I added one book to my library from my iPad and one from my phone. They dont show up in the other place. They also dont seem to save or backup. That makes me nervous to input my entire library. I dont want to waste all of that time if my phone crashes or something! Outside of that, I love how you can add notes for each book (I added AR information) and that each student gets a passcode to use it. I like it, but I have a hard time recommending it without either the backup or sync option.

Not Slow about Literacy Leveler