> In our push for polish we had a goal of never dropping a frame on high-end devices, and we mostly achieved that goal. The engineering complexity here is finding a way to fully utilize the multicore architecture of newer iPhones

Sorry… but all the app shows are a bunch of photos and a bit of text. Never dropping a frame on the most high end of devices isn't anything to boast about, To be honest for what it's doing it shouldn't be dropping a frame on any device in the past 3 years