Noom Trainer
Combines the benefits of an activity monitor (like fitbit), calories tracker (integrated calorific), training monitor/coach (integrated cardiotrainer pro) and a weight/training planner.
Could be great if it had the live tracking capabilities of Endomondo and the online/social portal of Runkeeper/Nike+/Suunto Movescount.
But can't be beaten as an integrated fitness/lifestyle monitoring tool.