If you are someone who struggles with a reading disability or are blind or low vission, this app is the best $10 you could ever spend. I replaced a dedicated accessible book reading device with this app a couple years back, and havent regretted it one bit. Keep in mind that this book reader costed me around $450. This app really proves its worth by the number of file types it supports, and by its ability to be customized for the individual using it. This app recently got a huge update, adding many features including one that allows Library syncing via iCloud to other IOS devices on the users account. SWEET! Thanks for such a great app, and keep up the great work.