For me it’s the notification light you used to find on older phones, was particularly good to know if your phone was charged without picking it up
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What?
If the screen has 60hz or higher refresh, I'm pretty sure it will. The screen itself may not use much, but the DAC will still use power.
I haven't seen this actually tested, but many claim the difference in battery life is noticeable. I don't think it matters much what app you use, many phones come with an AOD app, and I seriously doubt a third party app is better.
Typo: aod feature. Always on display.
It's supposed to drop down to 1hz. The CPU refreshing a pixel of an OLED screen or a notification led is the same power usage. That is even if you have a notification led, the CPU could still be stuck refreshing it at 60 hz.
AH ok that makes a lot more sense. ;) As I understand it, it's only the newest top displays that can go down to 1 Hz. Or maybe it's just when in use they can't for some reason. I find the 1Hz capability to be extremely cool, so it would be great if it's a more general feature of AOD.