I wouldn’t buy it if you have iOS 15
As soon I I updated to iOS 15 I had many problems with the app, every time I would try to connect to my lighter BT it would not work and then randomly it would connect but only for like 5 seconds then it would disconnect. I don’t know if this is just me or it’s multiple people but it needs to be fixed. Note before iOS 15 it was working fine and it was actually connecting and it stayed connected.