Apple nixes iOS version of popular brightness management tool f.lux

An Apple representative, Richard Chipman, told f.lux co-founder Michael Herf that he wasn’t allowed to turn either Xcode or the iOS SDK to f.lux’s purpose, Re/code explained. The app uses private APIs, which are strictly banned at the App Store — to get around this, however, Herf and his wife let people sideload the app for free via Xcode.