Big numerals, 1/100 second
I use this timer in my physics class. Giant numerals record well on videos of experiments. The apple timer included with my iPhone does not let me make the numerals large enough to see from a distance. The only app that shows to the full 1/100 second time position. For example: With this timer running in the background of an experiment my class can slow-mo video record a falling pumpkin, use video edit mode to examine the fall frame by frame, and see the motion down to the 1/100 second.