SQM Mobile

Companion app for SQM Toolbox (macOS). Automatically synchronizes field measurements from handheld SQM instruments with SQM Toolbox on your Mac.

Bring all your sky quality measurements together in one place. SQM Mobile is the ideal companion for handheld Sky Quality Meters, automatically synchronizing field measurements with SQM Toolbox on your Mac. It also imports measurements exported from Dark Sky Meter Pro, making it easy to build a single long-term archive of all your observations.

KEY FEATURES

Field-Ready Data Collection

• Quick and easy measurement entry for handheld SQM devices
• Manual entry of measurements from Dark Sky Meter
• Automatic GPS location recording for each measurement
• Timestamp for accurate astronomical correlation
• Offline measurement storage – sync whenever a connection becomes available
• Bubble level for accurate zenith pointing
• Import measurements exported from Dark Sky Meter Pro

Smart Location Features

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

Automatic Cloud Sync

• Seamlessly sync measurements to SQM Toolbox on your Mac via iCloud
• Private, secure storage – only you can access your measurements
• Works anywhere with an internet connection – no complex setup required
• Real-time synchronization across all your Apple devices

Quick Analysis

• Instant Bortle classification for every measurement
• On-device light pollution assessment
• Comparison with natural sky-background brightness
• Simple graphical display including twilight conditions
• Measurement validation and quality indicators
• Clean, intuitive interface designed for field use

Astronomical Context

• Automatic twilight condition detection
• Moon phase information for every measurement
• Sun elevation calculations

Simple and Reliable

• Designed for easy use in the dark
• Large, clear controls for nighttime operation
• No account setup required – simply use your existing iCloud account

Perfect for

• Amateur astronomers and citizen scientists carrying out site surveys
• Researchers monitoring light pollution
• Dark-sky organizations documenting observing conditions
• Anyone using handheld SQM instruments or Dark Sky Meter who wants long-term storage, synchronization and analysis of their measurements

Requires: iOS 17.0 or later, iCloud account

Works with: Unihedron Sky Quality Meter (SQM, SQM-L), Dark Sky Meter Pro imports, and manual entry from Dark Sky Meter.

Companion to: SQM Toolbox for macOS (available separately)