Question about Sygonix WLAN Thermometer/Hygrometer

Hello
I was able to connect the thermometers with wifi, but one of them keeps losing the connection. I will not buy one again.
My recommendation is Aqara. This still requires a hub. I use the product with an iPhone. If you have an Android, you need to check whether it works there too.

I really couldn't manage to connect the thing to WLAN. At first I thought it was the 2.5 / 5 Ghz network, but a separate WLAN didn't work either. At some point it got too stupid for me and now it just stands there as a normal thermometer :-) I now have the smart valves from Netatmo instead of the Danfoss valves. I can read and control the temperature in several rooms directly from my mobile phone. It's been working reliably for almost a year. Bought directly from the network, also available from Swisscom.