Not exact matches
If you have a simple text
file, no
images, no fancy
formatting — I would pay someone the $ 30 to
format it to epub and mobi, then upload those directly to the Big Four (KDP, NookPress, Kobo, and
Apple).
Apple's own Notes is an iCloud - powered aims more for a middle ground, with a clean and simple note taking interface that can take
formatted text, dictation, drawings (with
Apple Pencil support on the iPaD)
images, web snippets and
file attachments.