Can the STM also be free of charge?
Whatever you decide later on, to pay the fees of your sympto.ch account or not, you can print out your first chart from your account. After this period of time you will decide how to continue. You can go back to the traditional method of filling in your paper charts manually. The empty charts can be downloaded from the Learning Manual (User’s manual) page in PDF format. You will be able to fill them out yourself as soon as you know how to apply and interpret the STM laws correctly.