Last week Google introduced a radical new mail app, built on top of Gmail, that promises to cut through the pain of managing your inbox. Countless apps and extensions have promised to relieve the suffering of email, and I'm always open to trying another one. I spent the past few days using Inbox as my primary email app, and here's how it works. Inbox's approach is focused on giving you access to the most important information first, eliminating the need to dig through emails for essentials such as attachments, photos, and travel details. Its smart reading function abandons the classic chronological presentation of email in favor of grouping similar messages together and prioritizing them by importance. The main dashboard, titled simply, "Inbox," acts as a feed of all your incoming mail, which is placed into smart categories Inbox calls "bundles." Your Inbox comes with a set of pre-categorized bundles such as travel, purchases, updates, and social media...