ThermoPro TP357 Bluetooth Hygrometer Mini Room Thermometer Indoor with Alerts, Humidity Meter and Temperature Monitor with Smart App and Data Recording with Humidity Sensor for Baby Room Office

I started with 2 of these, one in lounge (magnet attaches to black surround on fire place, so no one notices it’s there, and one attached to side of kitchen clock (magnetically). Wife was always saying it was cold, so wanted to know exact temperature!But we dry washing in spare room with heated towel rails and a dehumidifier, which is con, but expensive. But, before hanging washing out, humidity upstairs and down, 39. Hang washing out and humidity in spare room shots to 54! So, it is a perfect indicator of when you can turn dehumidifier off, when it’s set on Laundry setting. You may be able to do this, with an automatic humidity setting, but this is a perfect and convenient method of knowing the humidity is same upstairs and down, and that the dehumidifier can be switched off.As I saw, humidifiers have auto settings, and I use this function in a holiday home, but this gives you far more control, if you have a couple for comparison. I have just bought 2 more, for the outside storage area and bedroom.Very useful if you are using expensive to run dehumidifiers or heating, and want exact readings rather than trusting to thermostats.Bluetooth perfect, range to too if 3 floor house. Takes one AAA battery. The app is beyond easy to use, and lets you name each location where you place them, I.e., Lounge, Spare Room, Shed.

I'm not complaining, but was surprised at how much smaller this TP357 is vs the TP350 and even more so vs my old, faulty TP-55. This actually works out better for me, but others may need to choose carefully.The data logging and the app are excellent. And despite being bluetooth-based, I can get a basic temperature / humidity reading from my car even when I'm on the first floor of my house, one room away from the front. (There is the extra distance of my front garden too!) At this distance I cannot update the history though. This is very consistent.I wish they made an outdoor sensor with remote display AND data logging + bluetooth. Maybe one day?

I bought a 3 pack to monitor temperature and humidity in my greenhouse and observatory. The sensor units are quite compact, unobtrusive and offer different fixing options or just work stand alone, pairing to my smartphone was easy. Readout on the screen and app are both clear.I thought the quoted blue tooth range was overly optimistic and this has proved to be the case, 80m should pick up any of the sensors from anywhere on my property but in reality, walls and other structures significantly reduce the range. In terms of making observations over time I 'm not yet sure if the units are logging data and uploading since the last update or just sending the current value when in range, so I don't know just how effective the data logging is going to be.

Worked perfectly out of the box, the multi-day record of temperature with highlighted max and min readings makes it invaluable for use in our greenhouse. It needs line of sight but I can stand in the window twenty feet from the greedhouse and get the current readings and the history overnight

Amazing full home temperature & humidity monitoring from the app on android or apple all works as should. I also like how it's on bluetooth rather than WiFi as not to weeken my broadband as too many devices on your home broadband router would otherwise make it slower for the TV,Xbox , phones ect , so these "Therm Pro" on bloototh is spot on and the Bluetooth connection within the app picks up all my devices round the house in all rooms . All in all works just as says on the tin as well as being very good value compared to all of the rest .I like how you can set names to each room and monitor full days ,weeks,years charts to help dyle in my heating to get it better set up and optimised.All in all fab products for amazing value and just works as well as easy to set up .

For the first couple of days I would have given these units a 5 star rating - see the update below, it’s now 5 stars -They are neat, compact, accurate and work well. I’ve put one in the loft and one in the study that we don’t use much at the moment to check on the temp and humidity. Both work very well. The app is good and easy to use but the pairing keeps failing. Once you switch off the phone/ipad the pairing is lost. It’s easy to set up again but a but annoying to do it every day.Update - after seeing the above review the seller contacted me (via Amazon) and asked for the details of the problem. The next day they sent me a message to say the app had been updated and if I deleted the app and reloaded it the problem should be sorted, and it was!The units are neat, compact, well made and accurate. The app is very user friendly and actually looks good too. I’ve switched off both the phone and iPad several times, including overnight, and the app pairs with the units straight away when switched back on, very pleased and I will now be buying another three units. This is what customer service should be, if I could give six starts I would.

I have found this very useful for monitoring temperature in different areas around the house to better control our central heating schedule. Battery life is good in my opinion (some reviews said it was not but in my case I disagree) one problem is the app seems to lose the data, I replaced batteries in my items and had to completely re-add as new on my app, meaning previous data was lost. Then briefly my original items came back with all history, which was great, then the next time I visited the app there was no devices again so have had to re-add and start again..again. But this might have just been bad timing from an app update and a battery replacement around the same time. Other than that, great value and accurate enough for a cheap thermometer for indication purposes.