QRtz

"quartz" or [kwɔːts]

"If a quick glance at your wrist to tell the time isn't your thing"

QRtz Wear OS watch face is compatible with all Wear OS by Google versions - Android Wear, ver. 2.0+ and Wear OS 3.0*.

(*verified working on a Samsung Galaxy Watch 4).

QR code

Watch face supports both 12- and 24-hour format, custom foreground & background colors and more...

Linear barcode

The barcode time changes every second when watch face is active. In ambient mode time automatically switches to only showing hours and minutes.

Aztec

Until you're fluent (?) in reading barcodes, you can always scan your watch with Google Lens or similar app to find out the time.