Solar Shadow Sketcher

Solar Shadow Sketcher is an offline engineering utility for estimating sunlight direction and object shadows from a manually entered coordinate, date and time.

Plan shade before you build, plant or place equipment — no account, no ads, no internet permission.

• Local NOAA-style solar position approximation (elevation and azimuth)
• Geometric shadow length and direction for a rectangular object
• Engineering canvas with pinch zoom, pan, grid, rotation and reset view
• Morning / noon / evening comparison for the selected day
• Seasonal scenarios saved inside each project (up to 100)
• Project library with search, sorting, duplicate and delete undo
• Automatic debounced saving with Room persistence
• Metric or imperial units; light, dark or system theme
• Versioned JSON backup export/import via the system file picker

All projects, coordinates and settings stay on the device. Use results as planning aids — not surveying or safety guarantees. Atmospheric refraction, terrain and nearby buildings are not modelled.