Opening the site with a Desktop User-Agent I now see it seems to be a Twitter-like thing that can be used through a (Desktop) browser just fine. Providing an app for that is okay, but why force people to use that app? Many websites already annoy you with a big cover asking you to install their app where you have to click a tiny little x to actually use the website. That's already bad UX, but why on earth would you not allow me to use the site with my Phone's browser at all? I'm now in a situation where I either need to install an App through Google's Play Store (which I can't), or switch my browser to Desktop mode and enjoy zooming and sideways scrolling (which I won't). That is just a horrible thing to do and people seriously need to stop doing it.
[Feel free to submit this to devrant.io]
Other than that, it seems like a fun site (although a couple subreddits might cover it as well).
There is also the problem when the image is squashed. It requires clicking on the image, which loads a new page with the image still squashed, and then clicking the image again to get it in a new tab.
Also - is it like this app is more like a reddit channel? (Or is there some more added value?)