Photographer here trying out this filter on an iPhone 15pro. Usually I shoot digital on a Nikon. Occasionally I'd like to leave the camera at home and shoot on my phone (like most people). In those times I can be disappointed by the quality of pics especially at times when the sun is high and photos look flat. The polarizer filter is one of my favorites to cut through haze and reflections also giving the sky a more saturated color. Although the idea of this filter had appeal to me, I ran into a couple issues.

First; having a clip on filter is easy on and off, but in reality this clip doesn't stay in place well due to the protective case on my phone. It has a large area to cover with the 3 lenses on the back of my phone, so any amount being skewed will show the ring of the filter in the photo frame. It doesn't sit flat and the point of convenience of the clip-on negates taking off my phone case. Also the filter is meant to rotate or spin on the frame to achieve the best results depending on the angle of light entering the camera. In this application twisting the ring easily dislodges the clip from its position. Its a trick to hold it all in place on your phone and twist the filter, and then also keep eyes on the image quality to know when you get it on spot.

Second; let's discuss the filter. The polarizing effect is there, but super hard to discern. It maybe is because there isn't an airtight ring around my lens but places where light can get in. Either that or it just isn't very good. I have other filters from K &F Concept that are very good, so I am more apt to suspect the mounting situation is to blame.

In my photos with the mountain top, the shot with the darker sky is a point in the video with the polarizing filter engaged. The second shot is with the filter on but spun until it is "disengaged" or representational of no filter.

So my overall take is that it works ok, but for me it isn't as easy as just popping in the phone and its a little bulky just to get "meh" results. I think it may work better for someone with a smaller phone camera lens and phone case. In my mind I would rather spend a little more for a filter with a smaller profile that stays on the phone better.