https://www.theverge.com/2017/8/21/16181316/google-inbox-unified-view-all

Google Inbox has a new “all inboxes” view on Android, allowing you to see all of your inboxes without tapping back and forth. This saves you two seconds of tapping each time you check your mail and keeps you from missing important messages arriving in your less-used mailboxes. While Gmail on Android has had this feature since 2015, it has yet to come to Gmail on iOS. Predictably, the unified view hasn’t come to Google Inbox on iOS either.

Unfortunately, the new feature doesn’t feel very organized. After all, the whole purpose of having different email addresses is to keep business and pleasure separated and the spam sent to the spam address. So far, there isn’t a way to filter or sort through the All Inboxes tab, but maybe disorganized clutter is what Google Inbox is going for with this new feature.