Mon.thly.Info – Free Online Tool Helps Track Your Cycle
Mon.thly.Info is an online tool for menstrual cycle tracking which allows women to input notes about their cycle and view the resulting history and stats. This site could be really useful for young women who tend to have irregular cycles, other women who perhaps aren’t on oral contraceptives and could use help keeping track, and women who are monitoring when their fertile period might occur.
After a quick and simple registration process, users can enter the day they started their last period, along with their own notes about other days (such as PMS symptoms or other information-whatever you’d like). It’s also apparently possible to enter basal body temperature information, which may be useful for women attempting to date their ovulation in order to try to conceive or avoid pregnancy. However, I wasn’t able to access this feature at the time I logged on.
Users also can set reminders in order to receive email alerts however many days prior to their predicted period or ovulation. Unfortunately, this feature and the site itself seem to be victims of their own popularity, having been featured at Bust and Jezebel – a note added on 2/12 states:
You might have noticed that Mon.thly was unavailable earlier today. The site now has so many users that my host is threatening to permanently disable my account for excessive use of resources. In order to prevent this, email reminders have now been completely disabled. I apologize for any inconvenience this might cause. Donations received to date, while very much appreciated, have come nowhere near the cost of adequate server space. I passionately want Mon.thly to remain free, but if membership continues its current rate of growth, that might be the only alternative to shutting down.
Donations can be made on the site, so if this seems useful to you, head on over, check it out, and consider donating to keep the service available.
[Thanks to David Rothman for the tip]


Google “ovulation calendar”, and literally hundreds of sites offering the same services come up. Many women find such tools useful, but I don’t think mon.thly.info is offering anything unique.
Lyrl, thanks for your input, and feel free to leave links for any that you would personally recommend.