Wow I didn't know any of them had step trackers without other internet crap. But some do, and are affordable. This one is $55:
https://www.casio.com/us/watches/casio/product.LWS-2200H-1AV/
Search term on Casio site is "accelerometer". You don't want the GPS ones or the "pace signal" ones.














I had always heard eyes evolved on multiple separate occasions. An octopus eye is anatomically fairly similar to a human one, but its evolution was on a completely separate path.