Using the Kindle app spoils you for anything less. This proprietary app for ebooks from the CBD "store" is very frustrating, if not disappointing. It is often slow to load, making you think it has "hung up" in the process. The same thing often happens when it syncs your library. The most frustrating part is when trying to read- you flip to the next page, and nothing happens. You try it again, and still no response. Any gesture does not register. Then, ranging anywhere from a few to many (usually many) seconds later, the page will turn. This is not an isolated occurrence; it happens frequently. Another maddening thing is that sometimes, if the last page of a chapter happens to have just a few lines- 1 to 3 sentences- it may completely skip that page when you turn to it and go straight to the next chapter. If you try to back up to it, it will go back two pages to the last full page. Too bad another reader can't be used instead!
One would think they would try to fix ChristianbookReader, especially since there are NO positive reviews! Apparently they don't care about iOS customers.