This process enhances the illumination to reflect what we actually see with our eyes. This is why Exposio photos are so attractive. Shoot the outdoor of a property and use the Blue Sky feature that allows you to replace a gray sky with a beautiful blue sky. This process is done in a second, and gives you stunning results. The App is free to download. Take as many photos as you want for free. Photos are marked with a watermark. In order to take off the watermarks, save and use the HDR pictures you will need to purchase photos individually or in bulk. Buy only the HDR photos you want. 1 HDR picture starts at $0.99. Lower price packages available to purchase. Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: http://www.exposioapp.com/en/privacy-policy/