I don't like fertility friend, I use an app called Ovuview. Temping is easy, just pick a time you normally wake and set an alarm to temp the same time each morning. Dont stress if you go to the loo in the night, or wake up early - just make a note of it. Also note if you drink alcohol or are sick as these affect temps. Pregnancy MIGHT be indicated by another temp rise after the ovulation rise but a lot of women dont get this. I didn't, I also didn't get an implantation dip some women claim to have. Temp may start to drop when AF is due. And temps are usually all over the place during AF. All charting will show for sure is 1. If you ovulated. 2. Length of your luteal phase so you can learn if you really are late for AF or just ovulated late.