After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
One last thing: the Apple Watch has an OLED display, and OLED displays do theoretically burn less power overall when they have more black on the display than white.
This isn't a matter of theory. It is fact. To 'generate' black, current to OLEDs is shut off. No current, not color, just black. Any color you see, including any of the 50 shades of gray, is the result of OLEDs using current. Black is off, anything else is on. This is why we won't see an Always On mode anytime soon. It just uses too much battery.
As I said, on an Android phone, changing as many apps as possible to black background - I saw no measurable difference.
