Bortle + SQM
Darkness context before you leave the city.
Free dark-sky map
Start with the map. Decide with Pro.
The public map is the acquisition surface: light pollution, Bortle/SQM, cloud, moon, aurora, ISS, Starlink and accommodation hooks in one place. Pro turns that into saved spots, alerts and best-night decisions.
Moon + cloud
Know if contrast and cloud risk make the trip worthwhile.
ISS + Starlink
Free event hooks for casual users and photographers.
Source labels
Separate live data, estimates and editorial guidance.