C-pen

The company does. Have you looked at http://www.cpen.com/software at all?

This link's O/S dropdown does not list iOS as an option - only computer O/Ss and Android. So far it doesn't look like it can. I have emailed their support and hopefully they'll answer back soon. A couple months ago I read from their support on another website that they were making an App that was available in the App Store, but to date there is still nothing there. I just ordered this pen, so if I can't use it truly on the go but must be tied to my laptop, then I should probably return it and find something cheaper, we'll see.