I don't think you need an app for this at all. What I've started doing is just printing a calendar and writing down whatever I've accomplished that day - sort

I don't think you need an app for this at all. What I've started doing is just printing a calendar and writing down whatever I've accomplished that day - sort of a reverse to-do list. Looking at whatever I did yesterday reminds me of how I felt after finishing those tasks, and looking at blank spots does make me feel guilty (but not quite as overwhelmed as looking at a long to-do list).