Cathode: Nixie Clock

A nixie-tube clock for your wrist, drawn as a crisp flat graphic. Four glass tubes glow with bent-wire digits in your color, and when the minute changes every tube that changes flashes through its cathodes as the new digit lights up.

FEATURES
• Flat nixie tubes with the faint unlit cathodes behind the lit digit
• A cathode flash and soft re-light at every minute change; perfectly still in between
• Six complication slots, each with useful built-in data underneath, so nothing is ever empty
• Weather on top and the date on a label plate (three formats)
• A single-digit hour drops the leading tube and re-centers the clock

DATA SHOWN
• The weather now with today's high and low
• Two pills: steps (with a goal bar) and heart rate by default
• Three keys: notifications, chance of rain and battery until you set a complication or app shortcut
• Bottom pill: sunrise / sunset by default (UV index until set)
• Date: weekday, day and month; week number; or moon phase

SETTINGS
• Colorway: 13 (classic orange, amber, ice blue, green, royal blue, violet, red, pink, warm white, mint, gold, cool gray, cyan)
• Filament: Bold / Fine
• Glow: Off / Soft halo
• Tube mesh: Off / On
• Date plate: 3 formats
• Motion: On / Still
• Always-on: Digits + date & weather / Digits only / Digits + tubes + date
• 12- or 24-hour time follows your watch setting

BATTERY
The face only moves for about a second at each minute change and is completely still in between. The always-on screen is true black and lights under 8% of the pixels: the lit digits inside faint tube outlines, the date and the weather.

COMPATIBILITY
Works on Wear OS 5+ watches (Pixel Watch, Galaxy Watch …). Built with the Watch Face Format. It is a watch face only, with no phone app.

HOW TO CUSTOMIZE
Long-press the watch face, then tap Customize (or use your phone's watch app) to pick the colorway, filament, glow, mesh, date plate, motion, always-on style and the six complications.

PRIVACY
This watch face collects no data. Steps, heart rate and weather come from your watch and stay on it.