Yeah, I assume this is like a special treat or something. Later they compile them into on large special episode or so for BD release and TV unless they keep the format and air them before Owari again and add them as they are on the Owari BD.
The app also has some voice thingy and you get a stamp for loggin in everyday. If you get all stamps for a month, then you get a "gift".
http://dengekionline.com/elem/000/001/183/1183732/
https://play.google.com/store/apps/d...nogatari&hl=ja
You don't need a japanese ip or something.