General cemetery photos can be taken from within the app (at least on the iPhone - I don't know about Android)
From the app's home screen tap "Cemeteries"
Assuming you are at the cemetery, then tap "Show Nearest"
The nearest cemetery is top of the list so select it. If there are several clustered close together you might have to select the correct one.
Then click the "Photo" icon at bottom left.
A warning appears to say that this function is for general cemetery photos but not for grave photos.
Hit "Continue" and the camera app opens for you to take photos. Be sure to go back to the home screen and select "Take Pictures" for subsequent photos of graves.