Unfortunately, there's not a pepper spray iPhone app...however, there IS a pepper spray iPhone Case.
Here's the story behind it:
"After an exhaustive search for personal protection devices for his college bound daughter, Scott McPherson was disheartened. There were no easy-to-carry or socially acceptable options available in the marketplace. There were many pepper sprays and other various safety devices for her backpack, but none that were easily accessible. Then the dots were connected. Most co-eds don’t go anywhere without their smartphone so the optimal solution was to combine her phone and a safety device."
