Maybe take a look at the date of the post he was quoting.

My bad.

Oh I see, that was several months ago....
Anyway, after trying out Owlmail on mobile, I'm experiencing it to be very user-friendly. We do need to go through an initial setup process, which might take a little bit of time, but once that’s done, it works really well.
What’s more, we can send several types of attachments. Including several features that are different from the email service I used previously, which makes it more interesting—for instance, the ability to scan text and documents directly. There’s also a unique drawing feature available.