Inbox, aka Google's attempt at fixing the cesspool that is email, is no longer invite-only. You can download it right now at the Apple or Google Play store. To mark the occasion, Google's also pumped out some new features, including the super-important "undo send".
We weren't blown away by Inbox when we tried it out last year. But the app now has a slew of new features, including, yes, undo send, but also better integration with Reminders, and Trips Bundles that organise hotel, flight and rental information. If you haven't already, take it for a spin and let us know what you think.