The following Omron Blood Pressure monitors have are compatible with Kardia for US and Canadian users only:
Evolv Series
Upper Arm: BP7000
10 Series
Upper Arm: BP786, BP786N, BP786CAN, BP786CANN, BP7450, BP7450CAN
Wrist: BP653
7 Series
Upper Arm: BP761, BP761N, BP761CAN, BP761CANN, BP7350, BP7350CAN
Wrist: BP654, BP6350
5 Series
Upper Arm: BP7250, BP7250CAN
Platinum, Gold, Silver, Series
Upper Arm: BP5450, BP5350, BP5250
Wrist: BP4350
Other
BP769CAN BP Monitor
Relion BP300
You can find more information from Omron here.