If you have already paired your sensor, start by forgetting it in the bluetooth settings of your phone. Turn on the bluetooth. Turn on the sensor and put it next to your phone.

Follow these instructions to pair your Shapeheart heart rate monitor.

Then, open your Runkeeper application. Press the heart at the bottom right of the screen.

As the sensor is switched on and so is the Bluetooth, the sensor is displayed. Click on it.

From now on, the sensor is paired, the heart is red at the bottom right of the app.