It can acquire and display the latest heart rate.
It also supports complications and provides a simple heart rate display.
This is a standalone application.

*** Features ***

* Acquire and display the latest heart rate
* Displays the data of the past 30 heart rate measurements in a graph
* Complication support
* Full HealthKit integration

*** Functions to be supported ***

* Support for a variety of complications
* Notifies you when your heart rate is high

*** Caution ***

Due to the limitation of the OS, the complication will be updated 4 times in an hour.