Yes, the Victron SmartShunt is probably your best bet. I installed one last year.
Lots of folks still call them BMKs because that's how they were sold and talked about. But they aren't really sold as "kits."
I also have a Magnum BMK installed but it doesn't work via a phone app. Just on the Magnum ME-ARC50 monitor. And, this one is marketed and sold as a BMK "kit."
The Victrons seem to be selling out at lots of places and the last time I looked they were $130 on Amazon.
https://www.amazon.com/gp/product/B0856PHNLX