Above: "Deep Relax" app design concept by Radek Skrzypczak.Sure, Apple’s HealthKit looks pretty and may strike a chord with the masses. But in terms of design, Apple has only scratched the surface of what’s possible. The eight concept designs below show just how beautiful health tracking systems can be. They’re not available yet — and some may never come to fruition — but they offer a sneak peek at the ways designers are reimagining how technology can make it way easier (and maybe even more fun) to be healthy.