I bought myself a new hygrometer after accidentally breaking a Caliber IV. This SensorPush thermometer/hygrometer seemed to have good reviews on Amazon. I was watching it for about a month and decided to pull the trigger. It arrived and had no instructions, on the box it tells you to download the app from the app store. I downloaded the app and set up was very easy from there. This unit is really small and takes up very little space. Once I started to use the app I set up temp/ humidity parameters and for it to send me alerts if I ever hit my hi or low setpoints. It took a long time for it to equalize in my Prometheus humidor. I decided after it equalized that I wanted to do a Bovida calibration test. It took two days for it to get to 75%. Then I decided to put it into my Diamond Crown The Drake 160 count. This humidor is full with about 100 sticks in there. I am thinking of picking up another one since I have two humidors. Anyone else using a SensorPush? Currently this only connects through Bluetooth, and they are working on a wifi update for it. I'm ok with it connecting through Bluetooth. This sensor supposedly holds 20 days of data at a time. So far I am happy with it and hope it turns out to be a great purchase that provides me with years of service.