The Always On Display (AOD) lets you check useful information without having to wake up your phone. And even though it's always on the ready, it uses very little power.
There are several pieces of information you can have on your AOD, such as the time and date, calendar events, battery level, app notifications, and song information. It also comes with a variety of themes to choose from as well as different widgets to further customize the display to your liking. On the Galaxy Note9, a Screen off memo can be pinned to the AOD so you can always have it handy.
Always On Display is available on Galaxy S10e, S10, S10+, Fold, Note9, S9, S9+, Note8, S8, S8+, S7, and S7 edge. The availability may vary on other Galaxy models.
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