Suggest you read reviews on Amazon about the Temp Stick.
It appears it has the same issues that my Ring Doorbell products have.
That is disconnects from your WIFI for no apparent reason and can not be reconnected remotely.
I have used Sensaphone systems for over 10 years with no problems. I monitor my summer and winter homes. All that is required is a telephone connection and I am currently using the Verizon home connect for 5 plus years with no problems.
I have had problems described above with the Verison MIFI.