7-27-22 This has to be the worst app I have ever used. Or is it the Bluetooth that is installed into the battery BMS? Either way it reflects poorly on the good batteries that SOK manufactures. The app has a hard time finding the batteries from just a few feet away. If the batteries are discovered they mostly will not connect. I have two new 206Ah w/heater & bluetooth. If I waste enough time I occasionally get one or the other batteries to connect. But IF it does connect the display does not tell me WHICH battery is connected. Try to go back and see the other battery? Good luck. It may not even show up again. I have uninstalled and reinstalled app several times. That helps nothing. The SOK facebook group that SOK constantly refers you has been helpful for many of my questions but they always say the SOC value reported in the app are bogus. SOK, have you ever used your own app in a real-world setting? My new batteries work great but your app is a disappointment. Please get it fixed.