There is no "inbox" folder/label to see my inbox. I see "All inboxes", "primary" "social" "promotions" some recent labels, starred. No inbox. On the browser I have an inbox folder. Why no inbox button view? I'm not going to follow up with a feature request to your product team. This is like not having a 'delete' button on the original UI. The only button I ever click in gmail is "inbox" and "compose" the rest are useless. So yes, if you want to improve the rating of this app -- submit your OWN request to the product team.