I have tried a bunch of these time tracking apps, but I always just go back to tracking my time in a simple sheet in Excel saved to my Dropbox. It Just Works.

I have tried a bunch of these time tracking apps, but I always just go back to tracking my time in a simple sheet in Excel saved to my Dropbox. It Just Works. Everyone I know just "guesstimates" their time to the nearest hour or half hour. Except for lawyers, who bill in 6 minute increments.