Multiple installed of Home Assistant Companion App Android

Hi, may i know is it possible to install multiple instance of the HA companion app? I’m planning to install it at my phone and my wife’s phone, both are Android phones.

Will the tracker and notifications work independently works fine and independently?

Please advise.

Yes this is possible. There will be separate device trackers, battery sensor etc. for you and your wife. And also a separate service for sending notifications.