Apps over web sites?
The advantage of an app may be that it makes better (more legible or more convenient to control) use of the limited space on a smartphone or tablet screen than a Web site designed for desktop computers would.
If an app is free (both up-front, and in terms of no "in-app purchase" malarky), why not install it and do the comparison for yourself?
|_MG_5100 by tim and jan|
from Welcome to the Saloon!
|The Grimm 11 year old by Ryan Gardner|
from Trick or Treat
|Heron with fish by APenza|
from A Big Year - birds