Query

[manishchoudhary11]

Is samsung dex an application or a hardware which needs to be connected?

[NeelaSinghal]

It is a Hardware 

[Pranay_Sodhani]

Samsung DeX is not hardware — it's a platform that extends your smartphone into a desktop computing experience. ... DeX is also available on Samsung's Galaxy Tab S4, where it can be used directly on the tablet's screen with the keyboard case or on a connected monitor with an external keyboard and mouse.

[rangilspa]

search it on google

[KiranMehra]

yes

[MehulMehan]

Yes you have to connect the samsung dex to a moniter.

[Pranay_Sodhani]

yes you have to connect to a Destop monitor.

[NupurMorar]

yes  samsung dex is  an application or a hardware which needs to be connected.