EVIL — watch face for Wear OS

A military-style data face for round Wear OS watches (built for the OnePlus Watch 3, 466×466). Two-tone stencil time, a red chrono seconds hand sweeping the minute bezel, and nine live data fields.

The animation is rendered from the face's own layers.

What it shows

Row	Fields
Top	date · heart rate · week number · unread notifications
Centre	time (follows the 12/24 h system setting)
Middle	battery · steps · step goal %
Bottom	temperature · chance of rain · distance walked (km, estimated from steps)

A stripped-down always-on (ambient) layout keeps only the time.

Values change colour with their state: heart rate is grey under 100, amber from 100 and red from 140; the message count is red only while something is unread; the battery label turns into a red CHG on the charger and the value goes red at 20 % or less. Distance uses 0.78 m per step.

Notes from the OnePlus Watch 3: heart rate shows -- until the sensor has a reading (it reports 0 between measurements). The system weather source always returns 0 for UV there, so that field was replaced by distance.

How it is built

Pure Watch Face Format v2 — the APK contains resources only, no code.

• tools/gen-evil.ps1 generates res/raw/watchface.xml and the bitmap layers. Edit the script, not the XML.
• build.ps1 builds the APK without Gradle (aapt2 → zipalign → apksigner, debug key).
• tools/measure-cpu.ps1 measures the watch face runtime's CPU use over adb.

.\build.ps1                     # build\orbit.apk
.\build.ps1 -Install            # build + adb install on the connected watch

Requires the Android SDK (build-tools 37, platform android-34) and a JDK.

Install

Grab the APK from Releases and sideload it:

adb install orbit.apk

Then long-press the current watch face and pick EVIL. Needs Wear OS 4 or newer.

Fonts: Saira Stencil One and a bold monospace, both under the SIL Open Font License.