No instructions. Puzzling interface. After splitting, the pages or smaller files must be individually selected, then individually converted, then individually saved. Then most of mine disappeared.

Split files kept disappearing. Also, as near as I can tell you have to upload the split files back where you want them one at a time.

The only way to get files into the app is to connect it to Dropbox. However it will not get past the "allow" screen for Dropbox. I'm thoroughly disappointed and want my money back!