This app works great, provided your parameters are correct. What I mean by parameters is proper lighting, camera exposure, proper color balance, etc. Also, make sure that it completely cycles through the upload process before you click analyze. If you do not allow that process to complete and jump the gun on pressing the analyze button, you may very well get a “no data selected” response. Regardless, this app works great for analyzing colors. I am able to caption my images as I capture and analyze them which is an excellent tool to determine the colors that look best on me. Thanks.