Yes, you can manually add a tagline (i.e. Tags: tag1, tag2) to bottom of your email and Taglocity will parse it and assign the tags when email with the tagline arrives in any of your ‘monitored’ folders. The Inbox is the only ‘monitored’ folder by default but you can add more, such as your Sent Items to the ‘monitored’ list via Configuration/Settings.

We do plan to build a BB app but can’t say when it will be delivered.

We will look into this…thanks for the suggestion!