Add a cardiac monitor to an existing Android app using Samsung sdk on Samsung phones. You need to have access to a Galaxy S5, S6, S7, S8 or S9 to work on this project.
The complexity of this projet is not to integrate the SDK. This is fairly straightforward. But once you receive the data from the sensor, you will need to create an algorithm to determine the cardiac rate.
I have only the Samsung Galaxy S6 but I'm certain it'll suffice for what you require. I can get working on it immediately and present a working solution as soon as possible.