Cannot Use on Multiple Devices

I love blogilates! I have this app on my iPad and iPhone. I subscribed on my iPhone, but for some reason I cant use this app on my iPad without subscribing again.
It doesnt make any sense! I would rather use the app on my iPad then my iPhone.
Just going to unsubscribe on my iPhone and re do it on my iPad. Ah!!

M Shark about Blogilates Official App