NASA public domain content is used respectfully.
We do not represent NASA (or any government)- see end of description for details.

Moon Phases for Wear OS puts a complete lunar and solar companion on your wrist. Track the Moon’s phase, illumination, distance, apparent size, and sky position for your location. Explore detailed solar data, live space weather, upcoming eclipses and meteor showers, plus past and future lunar outlooks. Uses high-quality lunar imagery online with seamless offline support.

Gestures & views

Swipe up — Solar + Space Weather

Sunrise, solar noon, sunset, nadir
Day/night length
Civil, nautical & astronomical twilight
Golden & blue hour
Equation of time
Space weather: Kp index, geomagnetic storms, solar flares, CME highlights & ENLIL impact ETA, high-speed streams, SEP, IPS, notices
Moon geometry: elongation, bright limb angle, zone ID

Swipe down — Lunar details

Phase & illumination
Age (days/hours) & cycle progress
Distance & apparent size
Azimuth, direction & altitude
Rise, transit & set times
Major phases (next)
Perigee & apogee
Detailed geometry: libration, angles, midnight position

Extras

Tidal influence
Visibility chart
Upcoming eclipses & meteor showers (peak & ZHR)
3-day forecast: illumination, distance, diameter

Shortcuts

Double-tap: zoomable Moon image
Back/Forward: ±24 hours
Calendar: preview any date

Wear OS ready

*NASA data used in this app (e.g., lunar imagery, solar flares, geomagnetic alerts, aurora forecasts, meteor showers, eclipse data, and daily astronomy images) is sourced from publicly available U.S. government resources and is in the public domain. No endorsement is implied. NASA content is used respectfully and in accordance with their T&C.

Links to NASA sources:
2025 SVS frames, preview images: https://svs.gsfc.nasa.gov/vis/a000000/a005400/a005415/frames/730x730_1x1_30p/

2026 SVS frames, preview images: https://svs.gsfc.nasa.gov/vis/a000000/a005500/a005587/frames/730x730_1x1_30p/

APOD image/video endpoint: https://api.nasa.gov/planetary/apod

SDO/AIA solar image, 193Å, corona: https://sdo.gsfc.nasa.gov/assets/img/latest/latest_1024_0193.jpg

SDO/AIA solar image, 304Å, prominences: https://sdo.gsfc.nasa.gov/assets/img/latest/latest_1024_0304.jpg

DONKI space weather endpoints: https://api.nasa.gov/#donki