I've built a versoin of this app a few years ago before mobile was big and there are features that I've always wanted for my app that I just didn't get to before I had to move on. The big feature that I've really wanted is integration with my calendar, email, phone, IM, fb, etc... Why? So the system would be able to tell me when I need to interact with someone using something better than a timer. You will probably need a mobile app for some of this to work

There are also two people on IndieHackers who built a mobile version of this who you may want to talk to.

I also own the domain muchcloser if you're interested in it. Let me know if you want to talk.