OneRaySun

OneRaySun helps you see how sunlight moves through your rooms before you rearrange furniture or plan a renovation. Draw a simple floor plan, place windows on the walls, and watch sun patches update across the day. Build indoor rooms or outdoor balconies with optional shading obstacles. Scrub a timeline to preview light at different times, then review daily sunlight charts, seasonal comparisons, heatmaps, and per-window metrics. Sun Lab offers a standalone compass, azimuth, elevation, and solar arc for any location you enter. Your projects stay on device. Import and export JSON backups, generate PDF summaries, and explore sample spaces to learn the workflow. Units, display options, and workshop tools are easy to adjust. Designed for homeowners, renters, and designers who want clear, visual answers about natural light without cloud accounts or subscriptions.