Thousands of years ago, human invented many kinds of instrument to tell time. One of those is sundial, an instrument showing time by its shadow.

With this app, you can do sundial experiment.
First, place an Equatorial Sundial on any flat surface with AR technology. Then edit the position of sun, finally check the shadow. You can understand how a sundial works.

# You can select different latitude, change direction, and even do calibration on the sundial disk.