Digital Basal Body Thermometer, 1/100th Degree High Precision, Quick 60-Sec Reading, Memory Recall, Accurate BBT Thermometer for Natural Ovulation Tracking by iProven

I was able to try both thermometers, so here's my feedback that will hopefully be useful for the next person. I originally ordered the thin thermometer but there was an issue so then I tried the one with the bigger screen. If I had to choose between the two, I would prefer the thin thermometer.The thin thermometer is your regular, basic bbt thermometer. To use, you turn it on, it beeps, then stick it under your tongue, all the way to the back (on either the right or left side), when you first wake up in the morning. It's best to have at least 4 hours of uninterrupted sleep for the best accuracy. Then it beeps twice, and then you can remove it from your mouth. You would then log your temp and the time on your bbt chart. If you wake up and it's still dark, you'll need to use a light source like the light from your phone screen to see the numbers. You can also just read your temp later on in the day when you're more awake because the thermometer remembers your last reading, but be sure to note the time that you took your temp.The bigger screen thermometer is more for someone who prefers to read bigger numbers with a backlight. You won't need a light source to see the numbers because it's already built in. The beeping sound is also louder. I wake up early when it's still dark so I did find the backlight blinding and the beep startling when I'm still groggy from waking up first thing in the morning. To resolve the light issue, I just flip the thermometer down. I haven't found a fix around the louder beep yet. Hope this helps!

Update 11/7/24:This company was super great to work with. They saw my complaints, and sent me an upgraded version of their thermometer to try. It works great! It lights up, the numbers are large, and the button is easy to press. And it's easy to look back later at the temperature that was taken to record later if I want to do it that way. The customer service was top notch, so I would order from them again now.Original review:I wouldn't order this again. I didn't realize that the temperature doesn't light up. So since I'm using it for taking BBT first thing in the morning before getting up, it's dark, and I can't see the temperature. So then I have to come back later to actually record the temperature. I don't like the way you have to hold the button down in order to get the prior reading instead of it just showing it like others usually do. Also, pushing the button is kind of difficult. I wish it was a bigger button. I also question the accuracy a bit since it measures way different than the other thermometer I had. I got it to have more precise measurement since my other one only measured to one decimal point, but this one will measure at least .5 degrees off from other other one.

This digital basal thermometer works excellently —it's accurate, reliable, and easy to use. However, there are two small drawbacks. First, the lack of a backlight makes it a bit tricky to read in the dark, especially first thing in the morning. I’d recommend the backlight version for easier use. Second, the power button is a bit hard to press, which can be inconvenient. Aside from these minor issues, it's a great thermometer!

I ordered the smaller one a few weeks back. That was really not worth it. Very convenient to use. So I posted a review according to my experience and the team reached out to me promptly. They not only refunded the one I bought, but ordered the bigger one for me free of cost. And let me tell you, the new one is amazing! It is very accurate, very easy to use and looks sturdy. I cannot tell you enough about the product. The reading takes about a minute, but is stored for future. Decent size screen and backlighting make it very easy to read everything. It's worth every penny. A must try!

My wife purchased this to track her temperature each morning. It worked well for one year, then stopped working. The company promptly heard her concerns and quickly sent her a new thermometer. The brightness is easy to see first thing in the morning and the beeps are more quiet in comparison to other thermometers.

I have been using this for about a year using FAMM. It was great for a few months but started to notice my temps were looking weird and spiked. I changed the battery and after a few weeks would return to not being reliable.The battery on the screen always looked low even after I changed the battery so it was hard to know if I was it needed a new one.I think this basal thermometer was a great first one but I recently upgraded to temp drop and it already has been way more clear!!It seems this product only lasts about 6 months before it doesn’t work anymore, so I guess you could just buy a new one when it stopped working but I wanted something more reliable especially since I’m avoiding pregnancy currently.I would recommend this product if your starting to track your cycle but would beware it may need to be replaced after a certain amount of months.

It works just like a regular thermometer but instead of 3 digits it reads in 4 digits. It’s definitely easy to use, design is cute and small you can carry it anywhere, it’s got a a little case with it, easy to clean just a little wet wipe or sanitary wipe and it’s done. And it comes with a spare battery.