That’s pretty cool! Google maps has had this for ages on Android, but the few open source apps that support the Dutch transit system don’t have it, unfortunately.

I have good hopes that Öffi will support Dutch transit eventually (it’s in alpha and there’s a central location and somewhat of a standard protocol that almost every possible public transport company uses), so maybe next time I try it, I’ll be able to use it.

I haven’t looked into the source code, but the little experience in smart watch development I have makes me think there are reasons this feature only made it to watches now; the batteries are tiny and the processors are slow, even compared to cheap budget phones.