The gallery has a pic of the pc screen and there's this app called BrowsBuddy. How do we get the app to appear on the screen? I've seen it from the picture and realised we don't have that yet. Is it because the game is demo or can we get it to appear when we set our personality as "friendly/easygoing"?

It could have been that the screenshot with BrowsBuddy is from an old build and it is no longer a thing in the full game. Only time will tell, but there is no way to access it right now in the demo. Personality only affects how Adisorn interacts with you from what we know! So it wouldn't be that either [likely].