I track religiously in two apps, one that is like escapeartist mentioned above which I've been using for like 4 months and one with a rating scale that I've customized completely and have been using for years.

Both are very helpful, particularly in my continuing quest for a better med cocktail. And with very long term data I can go back and compare where otherwise I'd have mostly forgotten and have little basis for comparison.

The app I've been using for longer just produces a line graph, which has limitations, but is a useful barometer for overall state. The newer app produces a graph for each thing being tracked (depressed or elevated mood, anxiety etc).

escapeartist, sounds like you may be using eMoods. I paid for the lifetime pass and have contacted the developer a couple times with bug reports and feature requests. I am hoping he will expand the graphical charts, right now I take screenshots and paste them together each month, and putting those charts end to end and noting the med changes has helped me learn stuff about meds that I wouldn't have noticed otherwise.