Arrived on time!
Fits well on my Samsung S24!
Polarizing filter! I need to buy the lens cap!
The various components are perhaps a little expensive!

This is the best ND solution I have found. I am using an iPhone 11. The filter attaches easily and the clip is firm. The filter is so easy to adjust and I cannot fault its operation.

Easy to use, it allows you to significantly improve the quality of your photos, especially when there is a lot of light and shadows.

This filter set has completely transformed my phone photography. The magnetic attachment is incredibly convenient, and the variable ND filter gives me complete control over light exposure. I can now capture stunning long exposures and cinematic videos, even in bright conditions. The included cold shoe mount is a fantastic bonus for adding accessories.

I’ve used this magnetic phone filter kit and found it very effective. The clip holds the filter securely in place without shaking, and the soft silicone prevents screen scratches. The variable ND filter worked well for adjusting exposure and adding motion blur to my shots. The cold shoe connector was handy for attaching extra gear. It’s compatible with all iPhones and comes with useful accessories like a cleaning cloth and storage case.

a good polarized lens for the smartphone that covers all the cameras, so as not to lose the polarizing effect with any zoom.
I find the set a bit bulky to make its use very versatile; but you just have to get used to it.

I ordered this polarizing filter for my iPhone 14 Pro Max and I'm happy with it. The clamp fits well, even with a thick case. The cutout prevents light from coming in from behind - a clever solution. The polarizing filter works as expected, especially with glass fronts. The magnetic system is convenient, but makes rotating it a bit tricky. The results are impressive, as can be seen in the attached video. However, the effect is different for different reflections. As a complement to an ND filter, it is very useful. Overall, a solid product for smartphone photography enthusiasts that noticeably improves image quality. There are small weaknesses, but the advantages clearly outweigh them.

I got my new K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit today and anxiously opened it to give it a try. My first impression is that this K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit is a well built camera phone accessory.
It is made of metal, aluminum I think, and is solid. It comes in it's own zippered case with foam packing that speaks of quality too. The nice feature about this K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit is the magnetic method to attach the filter. The filter itself magnetically snaps into place with a firm grip. There is no concern that the filter may ever just fall off.
The K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit connects via a thumb screw that tightens onto the camera screen to hold the filter frame secure. This is a bit concerning to me as I would think that if you aren't careful you could over tighten the screw and end up breaking the phone screen.
When I attached the K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit to my Galaxy S23 Ultra, which has 5 camera lenses, it looks like the filter slightly blocks the bottom camera (Telephoto 1). However, as I switched between the camera zooms and I didn't see/notice any actual blockage of the lens. I will keep an eye on this as I use theK&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit more to see if any thing is ever obstructed by the filter.
The filter lense itself also is well made. It has an aluminum outer ring and fits nicely into the frame and the lens is made of glass that is tinted for the CPL effect.
In all, I give the K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit a thumbs up, but I do worry about over tightening and cracking my phone screen.

I was surprised how well this works to remove glare when taking pictures indoor at the aquarium. It is really fantastic at that.

My only concern is that you need to make sure to not have an overly bulky case. I have a fairly protective case, but it isn’t as bulky as the “old school” otterbox cases. This fits on my phone… but barely. It can be a pain to remove and reinstall. While it is always in my bag, I find myself using it only in circumstances when it would need to stay on. If I’m putting it on and taking it off, it simply stays off.

Overall, I’m very pleased with the results. I’m happy I have it, but I just don’t use it as much as I expected.

A CPL filter is extremely useful for car photography and with this you are now able to get better shots with a phone. I don't tend to use my phone for photography that much but this will be useful if my camera ever runs out of battery or if I forget my threaded CPL filter at the house. The clip is a bit of a pain to set up with a phone case but still workable and it is a lot more bulky with it attached but again it isn't that much of an issue.
It comes with a wipe which is really useful as fingerprints will be quite noticeable in photos.
Overall this CPL filter and attachment for phones is quite good and will be useful for people interested in car photography without a proper DSLR.