It‚Äôs always a little tricky to redeem promo codes that are handed out by generous iPhone developers. Sometimes developers forget to add all the vital information relating to the redemption of the code while sometimes it just plain hard to locate the redemption area in the iTunes App Store.
However when it comes to Apple, there is usually a way around. Just go to the following iTunes Store URL: https://phobos.apple.com/WebObjects/MZFinance.woa/wa/freeProductCodeWizard?code=REPLACEWITHPROMOCODE
And then replace the ‚ÄúREPLACEWITHPROMOCODE‚Äù part with the actual promo code for your app. So no need to scratch your head when it comes to redeeming a code next time.