MOBI was Kindle's old ebook format, and Apple Books does not read it. Filemorph converts a MOBI file to EPUB on your iPhone, so the book opens in Apple Books.
Older ebooks, especially ones bought or downloaded years ago, often sit in the MOBI format that early Kindles used. Apple Books, and most non-Kindle readers, only open EPUB, so a MOBI file needs converting before it will show up in your library.
Filemorph reads the MOBI file's chapters and metadata and rebuilds them as a standard EPUB, locally on your device. This works on DRM-free MOBI files only — books still protected by Kindle's DRM cannot legally or technically be converted by Filemorph or any other tool, since the content itself is encrypted against the reader that sold it to you.
In the app: Convert → To EPUB.
EPUB is the format Apple Books, and most modern ebook readers outside Kindle, actually support. Converting an old MOBI file to EPUB is what makes a book from an old Kindle library readable again on an iPhone or iPad.
Yes. Unlike web converters that upload your files to a server, Filemorph converts every file locally using Apple's frameworks. Nothing leaves your device, and it works with no internet connection. This operation is part of Filemorph Pro ($29.99/year, 7-day free trial on monthly and annual plans).
Only DRM-free ones. MOBI files still protected by Kindle DRM are encrypted against the device that bought them and cannot be converted by Filemorph or any similar tool.
Yes, the chapter structure and cover image from the MOBI file carry over into the resulting EPUB.
No, Apple Books does not support MOBI. Converting to EPUB first is the only way to get the book into Apple Books.
On-device, no upload. Plus 300+ more file operations.
Download on theApp Store