A native app that clones the Inbox web expereince

I love Inbox, but I really wanted a native app. This fits the bill. However, the inability to open (or even download) attachments is inexcusable. Whenever I receive a file I am forced to open a browser and navigate to the Inbox web page to get at it, which sort of defeats the purpose of having a standalone app. Once this is fixed I will be back to upgrade the rating to 5/5.

Épée about Boxy for "Inbox by Gmail"