&gt;  I prefer labeling over folders and the mobile GMail&#x2F;Inbox apps are a far better experience than the Fastmail app.<p>I use Fastmail, and they support standard internet protocols like IMAP and CardDAV. Which means I can use the standard Android email-apps, CardDAV sync, and have everything still work just fine.<p>No need to use an email-provider specific app, although Google and Gmail has tried to mentally brainwash everyone and their grandmothers that this is how email actually works.