Works just as promised.

I downloaded this app when it was offered free. I had recently been to the eye doctor for an exam and already had my PD measurement. I used an expired VISA gift card to take my photo three times and got a consistent measurement each time -- it was the exact same measurement as the one my eye doctor gave me. I gave this app five stars because it worked exactly as promised. For anyone who is concerned about this app capturing your credit card number, use an expired gift card or any loyalty card with a magnetic strip on it as long as it is the same size as a regular credit card.

Sewladi63 about Pupil Distance PD Measure, v1.2