Oh and while I'm here the single layer non editable menu / weird grid is also the worst. I grew up texting under the desk on a nine key and only checking after I'd selected the contact to send to. Give me that level of muscle memory again someone, anyone, please.
Pebble watches are operated with physical buttons and you can definitely take advantage of muscle memory.
I made Type Nine for iPhone, and have waited a long time for Apple to open up for doing it on the watch.
https://typenineapp.com
PS. I typed this under my desk!