iAudiobooksConv is an application for easily encoding your audiobooks to M4A format compatible with iOS devices.
The program has convenient UI and can convert multiple files in batch.
After opening the app there is an empty state that allows you to select a file of folder with the audiobook:
Then you can specify the book's title, author, and chapter titles:
Then the books queue waiting for the start of the encoding process:
If you press on the convert button you'll see the next screen: