This app was mentioned in 6 comments, with an average of 6.17 upvotes
Basically, the status bar in Windows will burn onto the screen. Windows by default uses relatively bright colors and persistent GUI features. Combine those two and that equals burn-in in a relatively short period of time.
OLED burn-in comes up, a lot of Redditors mention that their OLED smartphone doesn't have burn in issues. That's almost always not true and you can test it yourself using a gray background. If you have a persistent navigation bar, you definitely have that afterimage perma-etched into your display. It's just not noticeable because that burn looks like a nav bar.
For those interested, you can test for yourself whether or not your OLED has burn-in:
https://play.google.com/store/apps/details?id=de.lappe.tim.android.lcdtest&hl=en
EDIT: My six month old Pixel has burn in. Minimum screen brightness.
Is it burned in or is it a temporary image retention? I've noticed this exact thing but it goes away after a few hours.
Try running an OLED burn in fixer like this. Fixes image retentions for me so I know it's not burn-in. Put phone on full brightness and on each color for like 2 minutes or so.
I just used this tool to display the subpixel colors on my tablet. No sign of burn in whatsoever. Its a device I bought nearly two years ago and that I use every day to an extent that I need to recharge it daily.
I did the same on my S4 and also found no signs of burn in. Every picture is completely uniform. I bought the phone a few months after the tablet but used off of Ebay. If I remember correct it was already a year old according to the documentation from the seller. I did the same test back then btw.
Don't get me wrong, I no that burn in is not a myth. My girlfriend's Galaxy S3 Mini burned in quite badly in less than a year. But she used that phone exclusively with 100% brightness (the device lacked an ambient light sensor for whatever reason) and is a first grade Facebook junkie, with I assume at least 80% of her usage at that time was within that app.
I don't really do anything to keep my devices from burning in though. I naturally adjust my brightness on the tablet up to a few times a hour if the ambient brightness changes just to avoid eye strain (I can read that way as strainless as on E-Ink) but use full brightness whenever necessary. I just use my devices so versatile that they don't get subjected to a lot of static imagery naturally I guess.
I do however don't have a status bar (immersive mode system wide) on my device since I got a smartwatch in late 2014.
I agree with you though that even a little burn in after some time is often not so problematic to offset the advantages of OLED.
https://play.google.com/store/apps/details?id=de.lappe.tim.android.lcdtest That with 18:9 mode.
Try using a burn in fixer app like this
Put your phone on max brightness and swipe through the different colors, leaving them on for maybe 5 min for each color. Make sure it's full screen
This may help if it's image retention. If it's actually burned in though, gotta send in to Samsung :(