iProvèn

Digital Basal Body Thermometer 1 100th Degree High Precision Quick 60-Sec Reading Memory Recall Accurate BBT Thermometer for

731+ bought in the past month

$8.99$12.99

About this item

  • Clinically Accurate Basal Body Thermometer for Natural Family Planning — Use iProvens BBT to detect your ovulation pattern and pinpoint your fertile window. Special chip for accurate readings to 1/100th degree.
  • Reading in 60 seconds, faster than any other BBT — The ovulation thermometer has a small tip that warms up quicker and therefore delivers an accurate reading of your real body temperature faster.
  • Manually enter your temperature in any ovulation app — The iProven Basal Body Thermometer does not synchronize with an app, but you can manually enter your data in any ovulation app. Or print the chart and track your cycle on paper!
  • Easily replace the battery in 4 steps — When the empty battery symbol is displayed, this is how you can replace it: open the cap; hold the battery case between your fingers and remove the battery with a needle; insert a new battery with the '-'sign facing up; put the cap back on.
  • Order today and you’re protected by a 100 days, no-questions-asked, full replacement policy and world-class customer service.
$8.99
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Product details

BrandiProvèn
Special FeatureHigh Accuracy
Colorwhite
Age Range (Description)Adult
Included ComponentsBattery
Outer MaterialPlastic
Specification MetFDA
Display TypeDigital
Product Care InstructionsWipe Clean
Unit Count1.0 Count

Technical specifications

product_dimensions26 x 0.01 x 0.01 inches; 1.13 ounces
item_model_numberBBT-113Ai
batteries1 Nonstandard Battery batteries required. (included)
date_first_availableOctober 25, 2018
manufactureriProvèn
best_sellers_rank#18,083 in Health & Household ( See Top 100 in Health & Household ) #3 in Basal Thermometers

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Customer reviews

4.26,186 ratings

Customers say

Customers find the thermometer to be of good quality and easy to use, with quick readings and accurate temperature measurement.

★★★★★

Works great and if not warranty/service is great

mom5kidsNovember 10, 2025✓ Verified purchase

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. Read more

★★★★★

Easy to use, great customer service

Donna CFebruary 3, 2025✓ Verified purchase

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! Read more

★★★★☆

I like it

NatalieOctober 25, 2025✓ Verified purchase

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 Read more

★★★★★

Bang for Buck

MadisonFebruary 23, 2026✓ Verified purchase

For the price, this is a GREAT thermometer. Reads effectively, the beep is incredibly easy to know when it’s going. Takes one minute to read! Only thing it doesn’t have is a lit screen, so I usually have to shine a light on it. Read more

★★★★★

Comes with an extra battery!!

Laura Polacco WellnessMarch 9, 2026✓ Verified purchase

Works great- has temperatures measured to two places past the decimal (like 96.68 degrees) And comes with an extra battery!!! Read more

★☆☆☆☆

Battery glued to the instructions

Paul RussellJanuary 27, 2026✓ Verified purchase

Waste of 7 bucks. Absolute garbage! The battery died a couple hours after it arrived. They did provide a spare but they glued it to a piece of paper which of course pulled away stuck to the back of the battery. The back of the battery they tell you not to touch with your bare fingers? Couldn’t even read the numbers on the battery because of the glue and paper stuck to it so I ended up throwing the damn thing away. Lesson learned! Read more

★★★★★

Updated Review - Great Customer Service!

Sally SueOctober 16, 2024✓ Verified purchase

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. Read more

★★★☆☆

Security seal broken and retaped

Kjrg19November 12, 2025✓ Verified purchase

Security seal was cut and a new sticker applied. I thought I was buying this item new but it’s not. Just be aware when buying this product. The display is easy to read and thankfully it was easy to clean (just be sure to clean before use in case it’s a returned product like mine). It has one button and is easy to use but takes awhile to get a reading. Read more

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