After buying this app, you are presented only with an in-app purchase catalog whee you can buy a guide for your camera for $29.99.
Why charge for the viewer then? Its useless on its own. $29.99 is not unreasonable, but I wont pony up after this deception, sorry.
jl_yvr about Camera Master - Master Your DSLR - For Nikon, Canon, Sony, LUMIX & GoPro, v1.2.14