The site is clear and beautiful, as needed for a new product.

But you ask us to review your startup and not your website right ? :)

So here's my thought on your product: Having "must have" content on one platform is a good idea. It then garantees new & quality content. But my question is about this very content: How will you filter the photos in order to keep a great content while filling up your user base? is there moderators or content-filtering algorithms? Because in case you haven't thought of that, the risk for your app is to besome an lesser instagram...

Great design work though ! (sorry for my poor english)