Find passes
Use satellite visibility as the free curiosity hook.
Free Starlink hook
Track Starlink. Plan the rest of the night.
Satellite trains are a high-intent reason to open DarkestHour. The real product is what happens next: cloud, moon, darkness and alerts so users do not waste the trip.
Avoid ruined frames
For astrophotographers, alerts can warn before satellite-heavy windows.
Pro alerts
Save places and get notified when a worthwhile pass coincides with clear, dark conditions.