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 have bought this 2 times. The first one lasted 3 years, and maybe it would have gone longer if I hadn't lost the replacement battery - but alas I bought a new one instead. The new one worked almost identically for just over 3 months, and then started acting up. Obviously amazon return was out, and the manufacturer says 100 days full refund, but I was about a week over that when it quit. Given it also has a 2 yr warranty and I had used the other one for 3 yrs, I emailed the manufacturer and they quickly got back to me. They suggested a trouble shoot and offered id it didnt work they'd mail me a new one. The troubleshoot didn't work. After letting them know they immediately sent me a replacement without any struggle. I am impressed. So while my 2nd one did have issues, I give this 5 stars for history and a company standing by their warranty. The thermometer measures fast and accurately. The Last feature is nice.

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.

Updated review: customer service for this product is top notch. They really wanted me to be satisfied with a thermometer and solved my issue. The second thermometer listed does have a light (with the larger screen). I got it 4 stars because of two reasons: the light stays on only briefly so you have to look kinda quickly, and this could be user error but there have been a few times (with each thermometer) that I thought it was ready my temperature but after over a minute I take it out and it’s just off. All in all, it’s precise to 2 digits and works for what I need! Oh, one more thing, the beep has woken my husband, so it’s not super quiet. Not a problem though since he’s usually awake before me anyways. And I like the case it comes in! Original review: I mean…I works…but heads up - there is no LED light. I know it’s supposed to be able to recall your last recording later but honestly it prefer one that has a light for easy reading without turning the room light on

Works well and takes accurate temperature readings! It takes awhile to read temps. It is small and the screen/font is on the small side. Overall, it works well and does what it's supposed to!

Customer service was great and responded VERY quickly to resolve the issue we had with the original thermometer we bought. They promptly sent a replacement.

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.

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!

Good product overall. Unfortunately, stopped working after ~3 months of typical daily use. Customer service was top tier though, quickly sent me a replacement, and followed up with me throughout the process!! Hopefully this one lasts longer than my first!

Worked perfectly and helped me to track

Good

Très bien identique à la description fonctionne très bien.

Using for Basel temperature. It does take up to 60 seconds to get a reading as it’s more precise, so bear with it. It was set to F first then was able to change to °C. Saw good and bad reviews and the overall great rating so gave it a try and happy with it.

Funktioniert wie ein normales Thermometer, zeigt aber 2 Nachkommastellen an. Wenn die Genauigkeit stimmt gibt es nichts negatives.