This app was mentioned in 24 comments, with an average of 1.75 upvotes
This seems like a good start, I hope it'll receive regular updates. In the meantime, I'd suggest Glance Plus, as that one is much more customizable.
I think I might have found out about it. Seems like the "Always On" display (seems to be the correct term) does only show *some* apps symbols. Now started using Glance Plus https://play.google.com/store/apps/details?id=com.thsoft.glance&hl=en_GB&showAllReviews=true Does seem to work so far.
Glance Plus
Glance Plus bring Nokia Lumia glance feature and ambient display feature on Android Nougat to all of your android smartphone with much more tweak. Some features:
Show basic info (notification, date, time) after you wave your hand over proximity sensor
Wake up on notification
Quick preview notification content
Always on
...
Give Glance Plus a try: https://play.google.com/store/apps/details?id=com.thsoft.glance
Rounded Corners
Replace your boring screen corner with a rounded one or decorate it with a beautiful corner image.
This app offers many settings which allow you adjusting the corner's radius, corner color, corner decoration image as well as specifying which corner to be decorated
Let decorate your screen corners: https://play.google.com/store/apps/details?id=com.thsoft.rounded.corner
List made using List My Apps
I have tried couple of apps from play store that do that. Glance Plus for example: https://play.google.com/store/apps/details?id=com.thsoft.glance
Found the app Glance Plus that could do this. There are other background images too.
You can try Glance Plus. I'm using it on Nokia 6 and it shows all notifications including Facebook and Whatsapp.
Try Glance Plus
Glance Plus simulating Lumia's glance display
Glance Plus provides the same features. You may want to give it a try
Give Glance Plus a try. It have similar features