Trouble with: setAdvertising heart_rate

I'm trying to make a little game with the puck, and the first part of my plan is to advertise the puck as a heart_rate monitor (service: 0x180D).

When I check the puck after a deploy with the Android nRF Connect app, it doesn't list heart_rate as a service.

When I compare to my Pebble, I can see it explicitly listed under flags & services.

The odd thing is I can advertise as a temperature gauge - but it's entirely possible I'm making mistakes.

This is my code:

NRF.setAdvertising({
  0x180D: [ 99 ],
  0x1809: [ 30 ],
},
{
  name: "Puck <3", // The name of the device
  showName: true, // include full name, or nothing
  discoverable: true, // general discoverable, or limited - default is limited
  interval: 600, // Advertising interval in msec, between 20 and 10000
});

Temperate correctly shows as 30c (in nRF connect), but the heart_rate is missing.

Any ideas/help?

Thanks!