The GroupCalc App is a tool to help photographers who photograph groups of people. It provides three calculators:

• Small Groups Calculator is used when photographing groups of between 5 and 40 people, arranged in two or three rows
• Big Groups Calculator is used when photographing groups of up to 400 people in 4 or more rows on tiered stands.
• Keystone Calculator is used when photographing a large groups of up to 9,999 people in an open area with the camera in an elevated position. For example whole school photos.

GroupCalc's interface uses large fonts and bold colours for easier visibility when viewed outdoors in the sun. On-Screen Help is available for all input values and calculated results.

GroupCalc is available for Android and iOS phones and tablets. It is available in a Free version, and a Pro version (see GroupCalc Pro Features).