I’m having the same WiFi connectivity issue. iPhone 6S plus, latest IOS, latest App version. When I try to connect, I receive message to turn on bluetooth, but my Avova is WiFi NOT Bluetooth. I can see the Anova and 4 digit code as a new network on my iPhone, but when I try and connect it asks me for a password and the 4 digits don’t work.
UPDATE 03/18/2020. Finally got my Anova Precision Cooker to connect to iPhone. The Anova instructions are awful and the App is poor. My problem is that when connecting for the first time, you are given several selections of various models. I was selecting the “WiFi or Bluetooth” since my cooker has WiFi, however that product is the incorrect choice. It kept asking to turn on bluetooth setting on the phone. My cooker is WiFi only and that didn’t make sense.
I scrolled down to the “Precision Cooker” model which I didn’t think was correct since there is no mention of WiFi in the description, and voila it asked me to enter the four digit code. I held down the target temp button for about 5 seconds and the code displayed. I typed it into the app and the app immediately searched for networks in my house. I selected a 2.4GHz network, entered the network password and all was good.
I have the iPhone 6S plus on the latest IOS. I turned the Auto Join network option off as suggested by someone earlier in this thread and all was good.
It is counter intuitive that the newest model of Precision Cooker that has WiFi enabled, is simply called Precision Cooker in the app with no mention of WiFi. Especially considering there is model option called WiFi or Bluetooth which isn’t the correct one. Go figure…
Anova needs to be more specific with their instructions.