Gmail on mobile does have a unified inbox:<p><a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;03&#x2F;30&#x2F;gmail-for-android-gets-a-unified-inbox&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;03&#x2F;30&#x2F;gmail-for-android-gets-a-un...</a>