AOD

[GangaSinghVirk]

If any one need always on display on Galaxy j series, then click this link  https://drive.google.com/file/d/1GuHRR-Qv9P6WiI330bPWSH9sJvAyU78w/view

Download the link and install the feature. After installing the link, if you will go to display settings, you will get the option of Always On Display.

[RakeshKuParida]

a series devices have inbuilt AOD I believe. so don't need to install any third party apps

[Aashish]

But while using 3rd party solutions beware of Screen burn-in.

[GangaSinghVirk]

No, its completely safe. I am using it from quite much time. And it works as system app.

[GangaSinghVirk]

It works as a system app. And what about those who don't have the feature.