It works. – Candle - Ultra Real Blow Out Review

Took me a while to figure out how to get it to work on my iPhone 6s. Click on the bottom blow-candle icon till it is yellow. If it is a steady flame, swipe the flame upward so that it flickers. Then blow onto your iPhone screen (not necessary the mic) and the flame will go off. You can also extinguish the flame without blowing by swiping the flame downward.
Review by Greencoral on Candle - Ultra Real Blow Out.