Crowd­ed places, ani­mals, wind or water — move­ment in gen­er­al is a No-Go if you’re tak­ing stereo pho­tos with your smart­phone. These are only some rea­sons why I start­ed work­ing on a solu­tion for sync­ing two smart­phones. After almost a year, I have a ful­ly func­tion­al set­up with two iPhones.