BLUR - Obscure and expire private photos in iMessage

Fortunately I don't need this, but this friend of mine...

@zouhairb Looks like one of the most useful iMessage apps I've seen yet. Just curious, are photos sent through Blur "seen" and stored by your servers? To what extent would I be giving up privacy by having my photos processed by your app? Sorry if this was already addressed somewhere, I'm just curious about the tech/security that goes into this. Thanks 👍.

What happened to this app?!!!!