I'm looking for an iPhone app that tracks "effective" hours worked over time.
Say I feel half efficient. Then two hours 'effort' amounts to 1 hour of 'actual' work done. If I'm at say 33% efficiency, for example, then when 3 hours go by, I know I've done about an hour's worth of real work.
And perhaps it plots time worked on a line graph over the long term. So I know how many hours I've worked today, or the past week, or in January.
The efficiency aspect is key, and it's the main feature I'm looking for. Does an app like this exist?