Hi Michael, sorry for the late answer, I moved so a bit busy building a house and such.
Anyways, I’m looking for CRUD. So not ‘managing’ Custom Post Types, but just adding, deleting, … (crud) for the end-user, from within an app on his mobile phone.
Of course that can be done by logging into the site on your mobile, but using an app (with their logo and custom post types) would be just that little bit more intuitive.