communicate with app

Hi is it possible to communicate with an external app on a phone or ipad from within Unreal ?t
I have some fitness hardware that is controlled by bluetooth via an app. This app is created by a 3rd party.
I would like to change the hardware settings from within the game by communicating with the App.
There is an API available for the hardware communication.
The unreal game would be run on my pc.
Can anyone let me know some key words or forum threads to check out as this is new territory for me.