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

Awesome tool to add if you're tracking for fertility or even just to measure your cycles. Using this with a tracking app helped me learn so much about my cycle. Love the back light and ability to check previous temps. Easy to clean and display size is great.

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.

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!

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!

Trash, stop working within 2 months of purchasing.update: the seller contacted me to resolve the issue and offered a resolution. Customer was satisfactory and therefore this review has been updated.

Love this thermometer it worked out for me. Love the fact that I can change it from degree celcius to degree Fahrenheit 🙂

Update: iProven reached out to me based on this review and offered me a full refund or another device hoping I’d give them another chance. I appreciate the follow up and outreach. I already purchased a different thermometer or else I probably would have done this. For that reason, I am adding stars.This thermometer worked great for one month. Don’t buy. I went cheap with this purchase because I wasn’t sure I would stick with tracking my temps. I simply should have started with a better thermometer.I read the reviews on how loud it is - this is true. I tried everything from covering it up with my hand or the plastic tube it comes in to wrapping a towel around it, but it still sounded like a fire alarm going off. I read the reviews complaining about how hard it is to read with no backlight - that was more and more annoying as time went on or what time my alarm went off, but something I could deal with. Finally, I read the reviews about how it broke so quickly - and I am one of those. I bought this product less than two months ago and didn’t use it every day and it still is broken — already. What annoys me the most though is it didn’t break and just stop giving temps or give wildly inaccurate temps, for a week it gave me 97.2X, which could have been accurate. However, I started having doubts due to using other tracking methods, so I double-checked with another thermometer and the readings were .6 off. According to it, I have the same temp when I first wake up as I do two hours after I have been awake, showered and heading off to work. Would have been nice to know that it wasn’t actually working. Save yourself the frustration and the wondering and just buy a better, different thermometer.

Why did you pick this product vs others?:I chose this because of the 2 decimals. I am using it to track my menstrual cycle. It seems very accurate but the probe does take awhile to result