This is so close to Sparrow because it completely rips-off the Sparrow's design.
Take a look at the compose new mail window, it's the same except the send button is red (and I think the bcc line has moved up). The toolbar icons and order of the icons are identical to Sparrow.
All sorts of other little things that could be different too are not, like the select state of the current email.
It would be ok if he, at least, mentioned that it was based on Sparrow.
There's one or two original things in the design, for example, he put his url in the left corner though.
Take a look at the compose new mail window, it's the same except the send button is red (and I think the bcc line has moved up). The toolbar icons and order of the icons are identical to Sparrow.
All sorts of other little things that could be different too are not, like the select state of the current email.
It would be ok if he, at least, mentioned that it was based on Sparrow.
There's one or two original things in the design, for example, he put his url in the left corner though.