ios app if it is a private blog

I have a private blog that is restricted from the net and only available to few users and available only for few iPs. is it possible to use wp for ios for my case?
I am new to ios apps etc, but my client has ipad.
Can it be done for my case too?

I am also looking for a solution that my client take a photo from her ipad and then store the image into wordpress site under specific users profile. Is this possible by a plugin, coding etc?