Pebble are pretty good.
They don't require any work to use, have a battery life measured in weeks, not hours, keep all your health data local unless you very specifically set it up to send it to a health app, and are open source and reasonably priced.
Not an advertisement. It's still a US company, but compared with something like a Samsung thing they're pretty cool.
That's a good idea. Be careful of the more advanced models finding ways to abuse/circumvent it though, even with only a limited set of parameters. Eg. A lot of git commands can be tricked into dropping into less which can drop into a full shell.
They know all the gtfobins.org tricks.