Android application that uses the sensor Zephyr HXM BT for getting data about hear beat number

I need a developer who poses this sensor, Zephyr HXM BT ([login to view URL]). The application must connect to the sensor and make some simple functions with the received data from the sensor. I already have 2 apk files. First can be fully recovered and consists in making the connection with the sensor, the second one can be partially recovered, the code has some differences and cannot compile if imported in Android Studio but the application does more stuff like saving previous runnings, displaying a chart and many other. So I can provide this apk files for making the development easier. I need an application that connects to the sensor, gets the data from it (heart beate number) and show it on a chart. I specified a developer who has this sensor because it is easier to develop the app if you already have the sensor to test on it while working. Otherwise, you can test it by using my sensor via teamviewer.