SQM Mobile

Companion app for SQM Toolbox (macOS). Intended for hand-held SQM instruments, automatically synchronising field measurements with the desktop SQM Toolbox

Bring your handheld Sky Quality Meter into the digital age. SQM Mobile is the perfect companion for field measurements, automatically syncing data to your Mac for storage, analysis and display.

Key Features:

Field-Ready Data Collection • Quick and easy measurement entry for handheld SQM devices • Automatic GPS location recording for each measurement • Timestamp for accurate astronomical correlation • Offline measurement storage - sync when connection available • Bubble level display for accurate zenith pointing

Smart Location Features • Automatic GPS coordinate capture • Manual location override (to set background conditions) for local surveys • Perfect for camping trips, dark-sky site surveys, and travel observations

Automatic Cloud Sync • Seamlessly sync measurements to SQM Toolbox on Mac via iCloud • Private, secure data storage - only you can access your measurements • Works anywhere with internet - no complex setup required • Real-time updates across all your devices

Quick Analysis • Instant Bortle classification for each measurement • Basic light pollution assessment on-device • Comparison to natural background light levels • Simple graphical display, with twilight conditions • Measurement validation and quality indicators • Simple, intuitive interface designed for field use

Astronomical Context • Automatic twilight condition detection • Moon phase information for each measurement • Sun elevation calculations

Simple and Reliable • Designed for easy use in dark conditions • Large, clear buttons for nighttime operation • No account setup - uses your existing iCloud account

Perfect for: • Citizen scientists or astronomers conducting site surveys • Researchers measuring light pollution • Dark-sky advocates documenting conditions • Anyone using a handheld SQM device who wants useful data analysis

Requires: iOS 17.0 or later, iCloud account Works with: Any handheld Sky Quality Meter (SQM-L, SQM) Companion to: SQM Toolbox for macOS (available separately)