Just install the watch face on the watch don't need the phone

HD Digital Watchface (12/24h format based on phone or watch setting)
cute, Clear & Battery saving watchface for wear os smart watches with digital time, Steps counts, Calendar, battery level, date, and High-quality definition

Features:

-HD theme
-Digital time (12/24h format)
-AM/PM indicator (for 12h format)
-Battery percentage with evolutive battery icon
-Calendar on the always on display (day of the week, day of the month, month)
-Digital Watch battery level with percentage
-High-quality definition
-Multilanguage
-Hyper realistic watchface
-Support Always On Display (AOD)
-Battery saver