See the Sun Before You Build
Room Sunlight Sim simulates natural light in your room. Place windows, pick a city, choose a time — instantly see where sunlight falls on your floor in 3D and AR.
Why Room Sunlight Sim?
Augmented Reality
Place a virtual room in your real space. Walk around and see how sunlight moves through windows as you change the time of day.
Global City Database
Choose from 100+ cities worldwide. Room Sunlight Sim calculates accurate sun positions using your chosen location, date, and time.
Real-time Sun Path
Drag the timeline to watch sunlight move across your floor. See sunrise, sunset, and peak sun angles throughout the day.
Privacy First
Optional location, camera, and account data help power simulation, AR, and purchases. We do not use your data for third-party ad tracking.