Something I read from a review (link below) may be a deal-breaker for some:
"There are still some limitations for book annotation. First of all, it does not support fixed-page books. It only supports mobile-type Kepub(ePub extension format purchased from Kobo). It does not support fixed-page e-books."
"As for files in other formats, standard ePub format books only support line drawing, not drawing and annotation functions, and pictures are not supported at all..."
If true, this is extremely disappointing. The limitation of line drawing only on epubs is a no-go for me.
https://www.archyde.com/measurementi...6032;报/