iOS & iPadOS · Built for Astrophotographers

Never waste a clear night again.

Live celestial radar, worldwide Bortle light pollution maps, 3-day astro weather forecasts, 12+ year historical climate reanalysis, and optimal imaging windows for any location on Earth.

Download on the App Store

assets/images/radar.png Real-Time Celestial Radar & Night Scrubber

assets/images/dark-skies.png Worldwide Bortle & SQM Light Pollution Map

assets/images/targets.png 12-Month Target Timeline & Up Next Queue

assets/images/weather.png Astro Weather & 12-Year Climate Reanalysis

Real-Time Celestial Radar

Dynamic altitude/azimuth polar reticle synced to your compass with 20° and 45° altitude rings, Meeus lunar tracking, and an hour-by-hour night scrubber.

Worldwide Bortle & Dark Sky Maps

Interactive light pollution overlays powered by the NOAA / CIRES Falchi 2016 World Atlas with instant Bortle Class (1–9) and SQM readouts.

Astro Weather & Climate Reanalysis

3-day night-aware seeing, transparency, cloud cover, and dew point forecasts alongside 12+ years of ERA5 historical clear-sky climate data.

12-Month Optimal Transit Calendar

Automatically calculates the exact night of the year each target culminates highest during moonless astronomical darkness, plus an Up Next queue.

Offline Ephemeris & SIMBAD Search

100% on-device celestial math, solar system ephemeris, and curated Messier/NGC/IC catalogs—plus live CDS SIMBAD resolution for millions of objects.

Multi-Location & iCloud Sync

Bookmark backyard pads and remote dark-sky parks with automatic CloudKit synchronization and AirDrop JSON backups across iPhone and iPad.