Sun Seeker
This app knows the nitigritties of the architect and comes as a saviour. It provides a flat view compass and an augmented reality (AR) 3D camera view, which shows the solar path, direction of sunlight at each daylight hour. This helps designers to come up with solutions for window coverings and outdoor spaces, upholstery and placement of art.
Available at $9.99 for iOS and $7.49 for Android