The always-on display is the feature that quietly changes what a wallpaper is for. On a Pro model from iPhone 14 onward, the lock screen does not go dark when you put the phone down. It dims and stays visible, which means the image you chose is now something you see for a large part of the day rather than something you glimpse when you pick the phone up.
Most wallpaper advice does not account for that. Here is what actually happens to an image in that state, and how to pick one that survives it.
What the phone is doing
When the phone goes idle, the display drops to a very low refresh rate and a much lower brightness, and it keeps showing the lock screen. The clock stays, widgets stay, and the wallpaper stays.
Nothing animates. Whatever motion a live wallpaper has, it does not play in the always-on state — you get a dimmed still frame. Motion returns when you wake the phone properly.
The wallpaper is also dimmed rather than desaturated on current versions, though how much depends on the ambient light. In a bright room it is more visible than in a dark one.
It turns off completely in several situations: when the phone is face down, in your pocket, when a Sleep Focus is active, when Low Power Mode is on, and when the phone has been idle and away from you for a while.
What it does to different images
Dark images survive it best. An image that is mostly near-black loses very little when dimmed, because most of it was already unlit. Deep water scenes, night skies, dark portraits.
Bright images become muddy. Dimming a bright picture does not make it a dark picture, it makes it a grey one. A daylight reef scene in the always-on state is a washed-out version of itself rather than a moodier version.
High-contrast images hold their shape. If the composition depends on the difference between light and dark rather than on colour, it still reads when dimmed.
Subtle images disappear. Anything whose appeal is in fine gradations of tone loses exactly that when the display drops brightness.
This is where a dark wallpaper actually pays for itself
The battery argument for dark wallpapers is usually overstated, because a normal lock screen is only on for a few seconds at a time. Always-on changes the arithmetic: the image is now lit for a large share of the day, and on an OLED panel every lit pixel costs power while black ones cost none. A near-black wallpaper in the always-on state leaves most of the screen genuinely switched off. A bright one does not. If you use always-on and you have ever wondered whether the wallpaper choice matters for battery, this is the situation where it genuinely does.
Two ways people end up using it
Worth knowing which one you are, because they want different wallpapers.
The first is the desk user. The phone lies face up next to a keyboard all day, and always-on is functionally a small second screen: a clock, a calendar line, a temperature. Here the wallpaper is furniture. It should be dark, plain and unmemorable, and the widgets are the point. Anyone who has tried a striking image in this role has found out within a day that a picture in the corner of your eye for eight hours is not a picture, it is an interruption.
The second is the bedside user. The phone sits on a nightstand and the always-on display is a clock you can read at night without touching anything. Here brightness is the whole question. The display dims itself in a dark room, but a wallpaper that is bright to begin with still ends up as a grey glow in a dark bedroom. Near-black is not a preference here, it is the requirement. Note that a Sleep Focus turns always-on off entirely, so if you want the clock overnight, do not attach Sleep to that screen.
Most people are one or the other, and almost nobody wants the same image for both.
Widgets matter more here
On a normal lock screen, widgets are a convenience. In the always-on state they are most of the value, because the whole point is information you can read without touching the phone.
A single widget under the clock changes what the always-on display is for: not a decoration but a small ambient panel showing the next thing in your calendar or the temperature.
One trade-off. Adding a widget disables the depth effect on that lock screen. On a screen you look at all day, the widget is usually worth more than the effect.
Choosing a wallpaper for a screen that is always on
The criteria shift from a normal lock screen in a specific way. You are no longer picking an image for a one-second glance. You are picking something that will sit in your peripheral vision on a desk for hours.
That favours quiet over striking, dark over bright, and texture over subject. It is the same shift that happens when a picture moves from a book to a wall.
If you find a wallpaper you love that does not survive dimming, the answer is not to compromise. Build two lock screens, keep the striking one on a Focus you trigger deliberately, and put the quiet one on the default screen that lives in always-on.
Quick answers
Can I turn it off?
Yes, in Settings, Display and Brightness, Always On Display. You can also keep it and turn off the wallpaper or notifications separately.
Does it burn the screen in?
The display shifts and dims to reduce that risk, and the clock is the only fixed element. It is a reason to avoid a wallpaper with a bright static element in one place, rather than a reason to avoid the feature.
Do live wallpapers still work?
They work when you wake the phone. They do not play in the always-on state, which shows a dimmed still frame.
Which iPhones have it?
The Pro models from iPhone 14 Pro onward. Non-Pro models do not offer it.
Where to get it
Aquarium 3D: Live Wallpapers leans heavily on deep water scenes, which are among the best-suited images for an always-on screen, and previews each at full size so you can judge how much of the frame is actually lit.
Turn always-on on, then look at your current wallpaper on a desk for an afternoon. It tells you more than any gallery preview.