|GPU:||Imagination PowerVR G6430 (quad-core graphics)|
Portal Knights on the Apple iPhone 5S runs manages a median FPS of 29. If you're looking to play Portal Knights on this device, then hopefully the developer makes some optimisations soon!
Portal Knights's battery life on the Apple iPhone 5S is brutal! With less than 3 hours of gaming from a full charge, stay away from this one unless you've got a charge cable handy!