The short answer
If a ghost image fades within an hour of showing a white screen, it is image retention and it will pass. If it survives that, it is burn-in and it is permanent. Nothing you install can reverse burn-in; the pixels are worn. What you can do is stop it getting worse: lower brightness, use a dark theme, turn off always-on display, and hide persistent on-screen elements.
Burn-in is uneven wear. An OLED screen makes light in each pixel individually, and the organic compounds that emit that light degrade as they are used. Pixels that show a bright static element, such as a status bar, a navigation bar or a keyboard, age faster than the pixels around them. Eventually they cannot get as bright as their neighbours, and the outline of that element appears faintly over everything else.
Blue subpixels wear fastest, which is why burn-in usually looks faintly yellow or pink where the blue has faded. That colour cast is often the first thing people notice, before they can make out any shape.
Telling burn-in from image retention
Open a plain white full-screen image
A blank note, a white webpage, or a solid-colour image from a test app. Set brightness to about 70 percent in a dim room.
Look for shapes, then look for colour
Burn-in appears as the outline of something you use constantly: the status bar, the keyboard, a navigation strip, a game’s heads-up display, or a car mount’s map interface.
Check on grey and on colours too
Some wear is invisible on white but obvious on mid-grey. Cycle through white, light grey, red, green and blue.
Leave the phone showing a moving video for an hour
Then repeat the test. If the mark is gone or clearly fainter, it was image retention and it has cleared.
If it is unchanged, it is burn-in
Document it with a photo if the phone is under warranty, because some manufacturers do cover severe burn-in within the warranty period.
Image retention is common and harmless. It happens when a static image has been on screen for a long time and the pixels have not yet relaxed. A navigation app left running for a three hour drive often produces it, and it usually clears within minutes.
What actually slows burn-in down
- Lower the brightness. This is by far the biggest factor. Pixel wear scales steeply with brightness, so a phone kept at 50 percent will outlast one kept at maximum by a large margin. Use auto-brightness and let it drop indoors.
- Use dark mode. On OLED, black pixels are genuinely off and age not at all. A dark theme dramatically reduces total wear, and it disproportionately protects the areas that suffer most.
- Turn off always-on display, or at least set it to only show on tap. An always-on clock is a static bright element shown for hours a day, which is the exact recipe for burn-in. Most implementations shift the pixels slightly, which helps, but off is better.
- Shorten the screen timeout. Thirty seconds instead of five minutes eliminates a surprising amount of accumulated static display time.
- Hide the navigation bar by switching to gesture navigation, which removes a permanently displayed element from the bottom of the screen.
- Use full-screen mode for long sessions. Video apps and readers that hide the status bar are protecting you.
- Avoid leaving a static app on for hours. Navigation on a car mount, a dashboard, a scoreboard or a stock ticker are the classic causes.
Be sceptical of burn-in fixer apps that flash colours at full brightness for hours. They do not repair worn pixels. What they attempt is to wear the surrounding pixels down to match, which reduces the visible contrast of the mark while shortening the life of the entire display. It is damage used to hide damage.
What manufacturers already do for you
Modern phones include several mitigations that run invisibly. Pixel shifting moves the entire image by a pixel or two periodically so that static elements do not sit on exactly the same pixels. Logo dimming reduces brightness in areas the system knows are static, which is why a status bar sometimes appears very slightly dimmer than the content beside it. And some phones run a compensation algorithm that tracks cumulative usage per pixel and adjusts drive voltage to even out ageing.
These work well enough that burn-in on a phone used normally is now uncommon within a typical three to four year ownership period. Where it still shows up is on phones kept at full brightness outdoors all day, phones used as permanent dashboards, and heavy gaming with a fixed interface.
Can it be repaired?
Not without replacing the panel. There is no software or electrical process that restores worn organic material. A screen replacement fixes it completely and costs whatever a screen costs for that model, which on a flagship is often a significant fraction of the phone’s value.
Before paying for that, consider whether it actually bothers you in normal use. Most burn-in is only visible on plain light backgrounds at moderate brightness, and disappears entirely in photos, video and dark interfaces. Many people live with it for years.
What about LCD phones?
LCD panels do not burn in the same way, because the backlight is uniform and the pixels only block light rather than emit it. They can show image retention, which clears, and they can develop uneven backlight over time, but the permanent ghost-image failure mode is specific to OLED and its relatives.
Does dark mode really prevent burn-in?
On OLED, yes, meaningfully. Black pixels are switched off entirely, so they do not age. It does not make burn-in impossible, but it substantially reduces the total wear and the contrast between worn and unworn areas.
Is always-on display safe to use?
It is designed with pixel shifting and very low brightness to be reasonably safe, and most phones survive it fine. If you are worried, set it to show on tap instead of permanently, which gives you most of the convenience with a fraction of the exposure.
How long does it take for burn-in to appear?
With normal mixed use and sensible brightness, typically longer than people keep their phones. With a static interface at full brightness for many hours daily, visible marks can appear within several months.
Will a screen protector or a case help?
No. Burn-in happens inside the panel and has nothing to do with what is on top of the glass.
Is burn-in covered by warranty?
Sometimes. Several manufacturers cover severe burn-in within the standard warranty, treating it as a defect rather than wear. Faint marks are usually declined. Photograph it on a white background and ask.
The practical takeaway
Test with a white screen and an hour of video to separate retention from real burn-in. If it is burn-in, accept that it cannot be reversed and focus on slowing it: drop the brightness, switch to dark mode, shorten the timeout, turn off always-on display, and stop leaving static interfaces up for hours. Those five changes cost nothing and are the difference between a panel that ages gracefully and one that does not.
