The Pebble Pace Pro is a new smartwatch with a large display and IP68 certification. Supposedly, the smartwatch comes with comparatively accurate sensors too, at least for its price. Also, the Pebble Pace Pro should last up to 15 days between charges on its 230 mAh battery.
https://www.notebookcheck.net/Pebble-Pace-Pro-New-smartwatch-launches-with-a-1-7-inch-display-and-IP68-certification-at-a-budget-price.597398.0.html