I must have downloaded all mood charting apps on my iphone..but I always delete them after a while..because they are either too complicated when I'm not well or look babyish, or because I can't put what I want on them..when I feel well I just don't chart...really I find the best thing I have is a little chart booklet a nurse gave me 2 years ago..I can't write much on it..but I've noticed that each time I was not well I did write in it and this is what helps me when I walk into the doctors office so I can answer some of the questions . but I think I will give some apps another try : optimisum (free) and maybe my mood tracker..tell us what works for you