STDL Biorhythms helps you to calculate your biorhythms. This is a small, convenient and original tool for PocketPC. At the first run you will see registration form (you may skip it, if you want to try STDL Biorhythms, but you can see your biorhythms for days before January 1, 2005). Then you have to enter date of your birth. On the next screen you will see three coloured bars showing your bio cycles. These cycles correspond to physical, emotional and intellectual cycles respectively. For each cycle you can see its phase (positive or negative) and position (red on the left means bottom, red gradienting with green means top). You can set up several profiles for your family (friends) and easy switch between them as well as you can find your nearest good / bad day. | 
