Their filter is magical, and it can filter wavelengths better than a display element can not emit them. It has by no means been made obsolete by the iOS 9.3 upd

Their filter is magical, and it can filter wavelengths better than a display element can not emit them. It has by no means been made obsolete by the iOS 9.3 update. Buy now for a chance to win a high fidelity USB cable made by Monster Inc. Props to Apple for incorporating f.lux functionality so quickly.