A power-user's version of the popular Heart-rate Monitor watch face.

Users can now configure the y-axis of the chart to set the maximum and minimum heart rate values to plot readings between. The reading rate can now also be set to plot every 3 to 30 seconds, meaning that heart rate can be viewed for the last 8 to 80 minutes.

Line thickness can be changed to make things easier to see, and there a couple of additional themes that can be selected from the Settings.

This premium version requests a one-time payment of $3 after a 48 hour trial - a code will appear on the screen which should be entered at https://k-pay.io/code/ to complete purchase and unlock.