My RING INDOOR Cam works great through the window - as others have said switch ir off - place it as close to the window as you can to prevent sun glare reflections. Motion sensing works perfectly well through the glass (double glazed units) and picks up people walking up my drive and records them perfectly. The streetlighting is enough of an illumination for them to see at night. My £20 Wyze/Neos Cams also work perfectly at night through window and also detect motion just fine.