ThermoProTP357 Digital Hygrometer Indoor Thermometer of 260FT, Bluetooth Humidity Meter with Smart App, Room Humidity Gauge with Humidity Sensor, 2-Year Data Storage and Export

These Thermopro Bluetooth hygromete and thermometer units are simply great. I am using them to monitor refrigerator and freezer temperatures. The accuracy is spot on when compared to a calibrated thermometer. The units agree within 0.2 F which is fine for my purposes. The graphing feature is what sold me and it works very well paired with both my iPhone and iPad. The signal goes through the appliance cabinet in the garage and then through two layers of drywall plus a brick wall to reach 20 feet into the kitchen. Not bad for Bluetooth. I like them so much I have bought four.

Needed this to monitor the humidity in our crawl space. Monitor is accurate, easy to set up, and easy to check with the app.

Has been working well with the iOS app. Good large screen, easily readable. Bluetooth connectivity is good, but I don't like that I have to auto-refresh each of them to get the historical readings (I have 4 scattered around, 3 in the house and 1 in garage).Only other gripe was that it appeared that 2 of the units dropped 3-4 days of readings in December 2023. They both dropped them on the same days. Haven't contacted ThermoPro about it, and it hasn't happened again. They were working perfectly for a few weeks before and continue to work now a few weeks after, so I'm confused why 2 of them would have dropped for the same number of days...perhaps something with the Bluetooth?4 stars for good value for price, and it wasn't mission critical but it's not great that it dropped 3 days of data.

These have better range than my laptop's Bluetooth, by like double. They're also very accurate as they match the temperature and humidity readings of my other devices within +-2 degrees or percent. Very happy with these, and great value for the Bluetooth function!

So much to like with these temp/humidity gauges. Very small and unobtrusive … seriously, they were a lot smaller than I expected. Easy to read display. Takes a AAA battery instead of a button battery (which is what I expected for the size). The Bluetooth connectivity and the app with clear readouts is a massive bonus. App lets you label each device and see key data easily for all devices. Range is great with these. We have a 3k square foot house and I can get a reading on ones in upstairs rooms from the basement every time I use the app.I can’t speak to exact accuracy, but the temps on these have lined up with other household thermometers we own, including one that’s been calibrated. Saw another review complaining about battery life at six months - I think that’s actually relatively good for a single AAA pumping out a Bluetooth signal. It’s about the same for a smoke detector using alkaline batteries or a remote control.This meter has been a big help to tweak our HVAC vent positions in the house for even temp distribution. So much so that I bought a second batch to put one in every room.Can’t speak to longevity. Hoping they last a long time. We’ve only had them for a few weeks and they have been very reliable so far.My only wish — not a complaint at all — would be a version with some way to connect to the internet so I could see these temps while out of the home. It would certainly cost more, which might negate one of the selling points (low price). As is with just Bluetooth, it’s still a great product and worthy of purchase.

I got the double set, one for my woodshop, and one for my store room where I keep my wood stock. I like to be able to keep an eye on the humidity in there.It's also nice to know the temperature, especially in the shop. I can turn on the heater or AC, depending on the season, remotely so it's ready when I am. I'm getting a third one for the kitchen, just because it's good to know.The app is simple and straight forward.Good stuff. Would recommend.Update; I now have 5 of these in my house. One of them is very important. It will notify me when the temp drops below 35° it's in an outcropping in my house that I sometimes need to put a space heater in to keep the pipes from freezing. It's also good elsewhere as I'm a woodworker and humidity is important. Definitely recommend.

Not certain they are precisely accurate, but accurate enough. They do work well with their app, and the one year memory feature is nice. Initial batteries lasted about 2 months.

I have 3 of these. They all perform fine. They have good battery life and their small size makes them easy to place anywhere.But, the associated app is very poor. First, it takes several attempts to get a new device added. Then when added, the app "forgets" about devices a few days later meaning I have to repeat the (painful) cycle.Also, there is no way to export the date from the app. (I want to export the data to do my own analysis. The graphs from the app are "ok", but FAR from sufficient.)If you just want a small temperature monitor, these are fine. If you want to do more with the data, I would look elsewhere.

SUPER CONVENIENT. I read them with their app from one floor above, no issues. Use your own alkaline batteries, big difference in duration vs the ones provided. The display is smaller and less bold as its brother TP49 without the Bluetooth option (on the left in the photo) but to me I never check the display anyways; always use the app for that. Not sure why bith models show a different humidity rating on the photo… the left one was (TP49 no Bluetooth) was just unpacked an hour before; maybe it needed to settle in (will have to be in the mail as it is being returned today). Wish the app (I use iOS) had the charts mire flexible to navigate in a timeline but still I am very very pleased with this product, so much value for my money.

Happy to have the temperature displayed in two locations. Easy to connect to your phone. Accurate measurements.

I use this to monitor my home freezer temperature. Has good range and accuracy.

Average for the priceAccurate within 2 degrees and 1 percent for humidity. I had two beside each other and that was the results. Most of the time they were the same

Accurate and Bluetooth and can keepTrack on my phone. We have placed them throughout the home and then Ordered more for other places in the home.