If you've not heard of Whatsapp before, you've most definitely have right now. Since news of its $19 billion acquisition, the messaging platform has shot up in popularity even more so than before. But could it possibly go through a design facelift?

This designer thinks so, and his concepts are very pretty indeed.

Here are four screens from the designer's iterations and sketches and they look very good. In fact, why shouldn't they migrate to this. Check out his post to read more about the process of coming up with these concepts.