Some features like adding card Spent and Estimate can be done from any browser and from the regular Trello mobile apps without any special installation. Features like the Plus menu or Hashtags are useful even if you don't need time tracking.

Enter spent or estimate per card for you or other team users using the built-in plus card bar or enter them directly as Trello card comments using customizable keywords. Chrome users can also use built-in card timers. Active timers are always visible in the Chrome plus icon and menu and are synchronized if you are signed-into Chrome.

Make reports, burn-downs and charts of spent and estimate by team, user, board, list, card or history. Compare 1st vs. actual estimates. Drill-down charts and reports. Export to the clipboard to paste reports on excel or an email.

Chrome's Plus menu instantly searches all your boards and cards and makes reports or burn-downs even when offline.

Assign multiple #hashtags to cards. Search them quickly from reports or Chrome's Plus menu. Everything is stored inside Trello. There are no other servers used.

Many more features! I consider all feature suggestions.