Product review (2 stars): Three days worked fine, then nothing but trouble. Don't waste your money! Takes a lot of work to get it going properly.
I purchase the unit to monitor temperatures in my office, store room and outside. Within three days one of the three sensors failed, within a  week the IOS system on my apple said unable to get sensor data. Forbidden! It worked fine for the first week and then nothing but trouble. Fortunately I had a old sensor and somehow it linked to that! So the only way I can get my data is on my laptop. Does not seem worth it for the trouble it has caused. Will consider returning in a few days unless it corrects its mess! I have researched the info from other user review on my iphone app and it says to delete their HQ data which I do not want anyway. That seems to have been the main problem. Also after installing the program on your phone you will need to install and reinstall a few times before it really works properly. If the company would read the reviews they might see that others have the same problems and try to fix it before they ship it out to customers!