I use T2 Mood Tracker on my android phone. It was developed by The National Center for Telehealth and Technology for the DOD (Department of Defense). I think it was originally developed to track PTSD but it is customizable. I added tracking for SI, irritability, and mania/depression. It gives you a chart of your moods, and allows you to enter notes as many times a day as you want. You can back it up to your SD card, and you can create reports in pdf or csv formats to export. I've been using it since March and I love it.