No content till you spend money. – Camera Master - Master Your DSLR - For Nikon, Canon, Sony, LUMIX & GoPro Review

"free app" has no content. Purchase HD or universal training manuals through this app. Don't bother. People are having problems playing video content. Just get the individual camera app and don't waste your time with this.
Review by mistert2 on Camera Master - Master Your DSLR - For Nikon, Canon, Sony, LUMIX & GoPro.