Tempdrop Fertility and Ovulation Tracker –Wearable Basal Body Temperature (BBT) Monitoring Sensor and Fertility Charting App Includes Comfortable Armband (L/XL - 12.5-18.5 Inches)

I brought this along with DAYSY thinking that this would be the inferior product but wow was I wrong. I do manual charting and Tempdrop is my go to for basal temp accuracy. If you do ONLY manual charting then this is the perfect thermometer for you. As long as you get 4 consistent hours of sleep then it will do its thing. Make sure to BUY DIFFERENT BAND SIZES!!! You may gain weight or lose weight or move in your sleep and you want to make sure this stays on.The MOST ANNOYING thing about this however is syncing the temperatures to the app. You have to HOLD the Tempdrop button as it syncs. If your thumb slips even just A LITTLE, it disrupts the signal and you start over again. That can irritate your thumb after a while.The Tempdrop app is okay but not worth the monthly fee to upgrade to predictions. Luckily, you don’t NEED to pay it to get your temperature uploaded and on record. Just ignore the predictions because it will be inaccurate unless you pay to use and adjust the feature. I personally pay READ YOUR BODY app 15 dollars once a year and transport Tempdrop temperatures with the click of a button and do my charting on there and on paper.

I have an erratic sleep schedule, as I work nights as a nurse 3 days a week. I do not fall asleep or wake up at the same time on any given day. Tempdrop has been a godsend. Paired with tracking ovulation using OPKs and a fertility-friendly app (I recommend PreMom) that tracks both OPKs and Bbt in one chart, Tempdrop has been amazing. I am in my 3rd cycle utilizing it and as long as I get at least 3 hours of sleep in any 24hour stretch, it has been accurate and easy!The armband can be tightened or loosened but I always keep it a little tight so that the plate of the thermometer stays in contact with my skin at all times. It's not the most comfortable but you get used to it! It does leave a mark on your underarm but it goes away with time and doesn't bother me.You do not have to take it off if you get up to pee in the middle of the night, it recognizes when you are awake or asleep through movement, etc.The battery life says it lasts about 6 months. I'm on month 3 and I haven't had any issues so far, tbd.Pro tips:1. Your temperatures adjust in the tempdrop app every time a new temp is added. For instance, once my temp is synced with the app, the previous 2 days of temps are adjusted so that when they are recorded on a chart (in another app -tempdrop app does not have charting yet), the progression is a steady incline or decline, so as to not look like your temps are erratic and staggered. If using a charting app -remember to adjust your previous days of temps depending on temp drop's adjustments.2. The first 1-2 months utilizing tempdrop, the device is calibrating to your body, so the first cycle will not be accurate, but keep it going! Mine only took one month to appropriately calibrate and now works like a charm with totally appropriate temps. I even double checked with oral temping a few times.

Update - March 2023: Sharing for anyone else frustrated with their armbands and looking for an almost-free solution.For the last several months, I've been using my TempDrop with a MacGyver'd armband made simply by wrapping 3" wide stretchy self-adhesive bandage around my arm. After turning the TempDrop on, I slide it between my arm and my "armband", and the TempDrop stays perfectly snug without me losing feeling in my fingers in the middle of the night. My makeshift armband is multi-use and way more comfortable than the TempDrop armband was before it broke...Also, I noticed they are now offering different sized armbands. This was not available when I purchased my TempDrop. I hope the new armbands are better than the one that came with mine, but just like the premium features of the app, I refuse to spend more money to use this expensive device. And, why should we when the calendar and graphing features in other 3rd party apps, like PreMom, are free?I still like the functionality of the TempDrop, as I mentioned in my original review. In fact, my temps from yesterday and this morning prompted me to take a pregnancy test -- and it's POSITIVE!!!...................................I really like the concept of the TempDrop. I tried a digital traditional style BBT thermometer, but after waking me up, my dogs didn't like it when I continued to lay there for 1-2 minutes instead of taking them outside or giving them breakfast. They would get antsy, and then start to wake my husband up. The convenience factor of the TempDrop is worth the cost to me. With TempDrop, my dogs wake me up, and I don't even think about getting my BTT. Most days, they're waking me up between 3:30-4:30AM, and I go back to bed. So, for me, the TempDrop is better than taking my BBT in the normal ways. However, the lacy armband while cute, is TOO SMALL. I'm not that big of a girl, but I had to completely let out the arm band, and sometimes it still feels like a blood pressure cuff squeezing the life out of my arm. I suppose that helps it to not move, but I hate the "ghost feel" that lingers on my arm for hours into the day. The sensor has TWICE not recorded or lost the info. Maybe I did something wrong, but, IDTS... And, my last issue is more with the TempDrop company and their app. For such an expensive little gadget, the "premium" features in the app should be standard and free. I know, I know, subscriptions are a gimmick, I mean method, for continued streams of income... I get it. It's ridiculous and I hate it, but maybe after dropping nearly $200 on their product, they could or should offer at least one year of free Premium. Maybe at the end of that year I would want to subscribe because I really like the extras that aren't provided in the free version. As it is now, I am not a subscriber, and I won't subscribe.In conclusion, I like the TempDrop. I would buy a new one if something tragic happened to it, but I will not subscribe to the app.