[askvictor]

One example: I would like to program a (dumb/ID-only) RFID card into it to unlock a door. I can't as the NFC off limits to apps.

[jrockway]

Apparently there is some transit system in China that uses this format for payments. So you can get one of those cards, add it to your watch, and program the RFID system to accept the ID of the card you got. There was an HN article about it this weekend.

[notpushkin]

I think that was NFC. The problem was, iPhone generated a random UID for all other cards, while this one was fixed.

[yellow_lead]

You can also use Garmin watches for transit in Japan, if it's a Japanese model.

[bean-weevil]

My Garmin watch will only allow me to add emv cards.