I use cyclotest for several years and absolutely love it! Just here the Rezis watched and now must go to urgently get rid of what: of cyclotest is super easy and the only symptothermal computers on the market! For me it was important to have a symptothermales device. All others are only available for a fertility feature ooooder only in Japan. And that Customs an expensive purchase (the then still illegal) catches, it I did not feel. The symptothermal method itself I find mega exciting, but simply did not nerves and time for the work out. That's why I use cyclotest, now with Zerivxschleimbeobachtung (formerly with Ovutest until I Zmethode had it). The contraceptive effectiveness is a Pearl Index of 1-3 (mean 97-99% safety), which for several years works for me :) It takes a little time to the terrible and highly fertile days close narrow, that's right. But hey, for the device gets my cycle! In the first quarter I played it safe and did not additionally prevented only in the infertile phase after ovulation, but now I have taken this skepticism and it is resorted to only to further funds, if the machine is indicating fertile or highly fertile. I entered at the beginning of ovulation as a further indicator of fertility and am moved with the times for cervical fluid. Sounds for many nasty, but is a great additional method to determine the fertility phase. I give the value once in the cycle, and is good. A friend of more use cyclotest as pure temperature computer and is also satisfied (means: they prevented it and is not pregnant). For Software I have then ordered and had no problems. Which is now no Higtech Mega program but does what it should: read the cycle data and save them as PDF on my PC. Now that is a folder with lots of cycle leaves now and then I forget that too, quite consistently is not. That's okay for me. It is true, in a new cycle start you can no longer draw the data on the PC. I now find not so wild and the problem I had now in the years to hire one or two times that I did not have my PC at hand. The cycle can start anyway during the day, the next measurement is then not until the next morning. If I get my days I prefer at bedtime to cycle on my computer and then start the new one. About the technology: cyclotest is now no ipod but the music is supposed to play with me in bed and not on the Verhütungscompi; p I never had problems with the data entry, the battery zickt even after many years not (there are almost 3). My advice: check whether you can use cyclotest (cycle length of 23-45Tagen, no shift work and a few more points, everything is on the Internet or their hotline call) and makes you about thoughts, whether you a certain amount of effort (ie fairs and at the beginning until the device you knows only 5 infertile days) the thing is worth, but which is still less than the NFP method evaluate fully itself. I can only say: rocking the part! It works and I will never again take hormones for prevention!