Mabis Digital Basal Body Thermometer for Ovulation Tracking, Fertility, Period Tracking and Natural Family Planning with Beeper and Memory, Oral Use Only, White, 15-639-000

I love this, however it says it measures in Celsius. My temperature has been 97.77 “Celsius”. 40C is a high fever so I’m either dead or it’s actually in Fahrenheit.

For the price, you can't beat this thermometer. I like that it reads to the hundredth of a degree. To ensure an accurate reading, keep it in your mouth for another minute after the beeps are done - and yes, the number CAN continue to rise after the beeps; it just can't decrease. I take my temperature in the middle of the night and either use my phone flashlight to read the number or wait til morning to record it (it retains only the most recent value). My one qualm is the battery cap pops off easily, but it's not bothersome enough to knock off a star. FYI, it will read temps over 100, but the hundreds digit won't display. So, it works just dandy as a regular thermometer, too, and will even do a special beep if the temp is over 100. FYI 2, "Lo" does not mean low battery...it means the temperature is lower than the thermometer "expects" and is waiting for you to put it in your mouth.For what it's worth, my SymptoPro course improved this device, and according to my instructor, my charting seems to be accurate. I would recommend this to anyone who's tracking cycle temperatures...no unnecessary bells and whistles, just does what it says on the tin.

Works as expected. Recieved in good condition. This is my first-ever thermometer.

This little thermometer became my best friend last year after we began TTC. Along with ovulation test strips and checking cervical fluid, there was no mistaking when I was most fertile. My biggest piece of advice is to maintain a strict routine and set an alarm each morning to temp. Don’t sit up, don’t drink water, nothing. Temp first. Put it in the exact same spot under your tongue every time. I used the fertility friend app which made my charts for me. You don’t need the ridiculous smart thermometers, this sucker gets the job done and is near indestructible. The one setback is lack of a backlight, but I was too tired to log after being awakened in the wee hours anyways, so I used the callback feature to temp when I actually woke up for the day.

I doubt accuracy with very little variation.

This thermometer works ok. It’s a good value for the price, but it takes a long time to read your temperature. It is reliable for charting for fertility awareness and inexpensive. Those are my two main advantages. I have been chatting close to two years now and my results using this thermometer have been consistent and reliable. So 4 stars for that.So why one less star? I ordered this same thermometer a year ago and it was the light pink cap like in the picture. Although it also takes a long time (1-2 minutes) to read the temperature, I also realize I’m not spending $100+ on my perfect thermometer. I recently ordered a new one and it was hot pink tipped. No big deal, I figured it was a minor supply change or something, but it sadly doesn’t function properly. It will read my temperature after two minutes or so, but once it shuts off it will not recall the last temperature. That feature is really important for those groggy mornings. *Amazon is sending me a new one to replace the malfunctioning one* and hopefully it is a fluke. If both thermometers do the same thing I will update this review.Overall, this is a good value and reliable option. The beep to signal a read temperature isn’t loud enough to disturb my husband, there are no lights on it and it has been consistent for me. Great value for those on a budget.