if it's any help, i used fertility friend this time. I found it to be a simple model for a newbie to charting like i was at the time. they have a free basic service which i used for a month or two and then did a VIP upgrade when i saw they had a special on...which they have often (so like $15 for 3 months etc). you can google it and it should come up first things first. you will need to buy a 'body basal thermometer' (BBT) from the chemist (they range from $15 to $20). basically they are like a normal one except they go to the two decimals (eg. 36.75, instead of reading at just 37.7). it makes a BIG difference when charting!