“How to quit porn” is one of the most searched lines in this space. The plan that actually holds is boring and specific: remove saved files, log out of throwaway accounts, put a filter on the browser, and decide tonight what you will do at 11pm instead of scrolling.
Then you need a response for the urge, not a speech. Delay ten minutes. Move your body. Text someone if you have that person. Mark a clean day when you make it through. The first week is mostly about surviving evenings.
You do not need a perfect identity
You do not have to call yourself addicted or join a 90-day challenge for this to count. You need a next action when the cue shows up. If mental health is in the mix, talk to a clinician. An app is a habit tool, not therapy.