I recently purchased both an IQC and an IQ2. They are good products, but both have one major flaw for iPhone users, which is my reason for giving them only 2 Stars. Both products are advertised as having a feature of a "Bluetooth App." In fact, the IQ2 Overview says that you can "track and report your vape dose per draw and per session." That was my primary reason for purchasing the IQ2, which costs more than the others. HOWEVER, this does not work for iPhone users. I asked Davinci about this. They responded with the following: "Unfortunately, Apple removed all vaporizer apps, including the DaVinci App; we apologize for that inconvenience! "However, we've devised a workaround using an app called the Connect Browser; here is some information that can aid with accessing the app on iOS. "DaVinci iOS Instructions - Connect Browser "Sadly, the app isn't working on the Connect Browser, and we do not have a timeframe for a resolution; however, we hope to resolve this soon! "Please feel free to reply to this ticket or open a live chat if you have any questions or concerns; our hours are Monday – Friday, 7:00 a.m. – 4:00 p.m. PDT! Have a wonderful day! " NOTE: Apple removed these apps from its platform over 3 years ago, yet Davinci continues to advertise its products as working with a Bluetooth App. I do not consider this to be honest advertising, and, this feature is what motivated me to purchase these products. And, to make matters worse, there's nothing in the instructions about this. SO, I spent several hours trying to get this to work, through their workaround, called "Connect Browser." But, that also does not work. Davinci should immediately correct their descriptions of these products, AND, make it a top priority to develop a workaround that works!!