Here's a quick tutorial where we take a photo of a neon sign and add a little extra to it with just a few quick adjustments inside Polarr.
Open the photo in Polarr.
Go to the crop tool and change the aspect ratio of the image to 1:1.
Again, in the color tool, we'll adjust the tint values in the photo to add more magenta to the image.
Next, we'll go to the light tool and adjust the contrast of the image.
Play around with this fringing tool to change how the fringe moves around the image.
Here's a video tutorial for those of you who are more visual learners.