If you want to improve your phone photography it’s worth getting a filter to bring out some additional optics that the phone’s lens can’t.This is a camera filter with a peg to grip over your phone’s lens(es) and take advantage of better contrast and reduce reflections that daylight bounces off. Its size means that if you have more than one camera on the back of your phone it should cover the others too, but it will also cover the screen too, so you may have to adjust so your controls aren’t blocked.Although to do that you’ll actually have to override your phone’s default auto adjusted images and do things a little more manually, or even shoot raw if your phone is compatible. If you just clip this on and expect to see any difference your phone will just readjust the colour balance to what it thinks looks best - so tap and hold to lock in your exposures!This filter comes with a thread, meaning you can twist it your my phone camera and attach it to any camera with the same diameter or use step-up/down rings and take advantage of having a filter across all your electronics!There’s a soft ribbed edge to twist the polariser comfortably and work out the distance it’s travelled by feel, although it would be handy to have marker dots on the rim to or mechanical stop to know the intensity you set the polariser to.While not an essential, it is a nice to have for those upping their iPhoneography or who also have a camera to get even more use out of it.