Twitter rolled out Night Mode for Android and iOS in 2016. Today, the company has rolled out an OLED-friendly dark mode for the latter. Twitter has announced a new feature called "Lights out" which brings a proper dark mode to its iOS app. Turning it on changes the app's UI to pitch black instead of dark blue. This does a better job at conserving battery on your device if it's equipped with an OLED display. To turn on this new dark mode, head over to the Settings and privacy > Display and sound menu and tap on the toggle button next to 'Dark mode'. Doing so will give you two options...