I have the app installed on an iPhone 12. I have 2 monitors on my boat, both are bluetooth, one has the BMV-700, and the other is a SmartShunt IP65. I noticed on the main monitor with the BMV-700, no trend data is ever stored. It only shows me what is actively happening while the app is open. However, the SmartShunt is storing and retrieving the data correctly. I have verified that I have the setting enabled for instant read out via bluetooth. So I'm not sure why it works for one but not the other.