Note Tapper was designed to allow you to type and store notes using a keypad on your Apple Watch and is used independently of your iPhone.
While its incredibly cool to use Siri on your Apple Watch, there are some occasions when you might want to make a note to remind yourself about something, but dont want to have to say it out loud. On those occasions, this might just be the ticket.
You can access Note Tapper quickly via its complication icon on the watch face screen.
Note Tapper is great for typing a brief note - nothing more - and can be used even if you dont have your phone with you.