Really? Are you being deliberately obtuse? For someone that has not been active at all and is looking to see what kind of activity effort brings them to a desired activity target, then taking notes of what you've done and what was achieved is useful info. "How often do I need to do _______ to achieve my goal of _______" If you thought you needed to plan 1 hour per day, but realize you only need 15 mins per day, that's useful. NOBODY is going to count their steps manually.