iProven Basal Body Thermometer with Backlight & Big Digits, 1/100 Degree High Precision, BBT for Ovulation Tracking, 30 Memory Recall, Accurate Fertility Temperature Tracker

I used this to try to track when I was ovulating for pregnancy, it does take a long time to get the temperature but I understand it trying to be accurate. I got pregnant after using it the first month, so I’d say it helped!

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!

Easy to use, lightweight, gets good accurate readings

Works as described , no issues

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.

Works great.

I’ve used this for about 3 years now and I’m just starting to have some problems with it. The button stopped working, and upon investigation I found the outside button was getting in the way but the inside mechanism and button still works. I peeled the outside part off like a sticker and it works fine now—I anticipate using it for years to come. The memory function and price are amazing, and I would have given it five stars otherwise, but the button issue is a major design flaw that needs to be addressed.