The creator of Sparrow? <a href="https:&#x2F;&#x2F;twitter.com&#x2F;mronge&#x2F;status&#x2F;702160883888185344" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;mronge&#x2F;status&#x2F;702160883888185344</a>
Then who is working on Google inbox?