Do Not Lust
You have heard that it was said, 'You shall not commit adultery.' But I say to you that everyone who looks at a woman with lust has already committed adultery with her in his heart. If your right eye causes you to sin, tear it out and throw it away; it is better for you to lose one of your members than for your whole body to be thrown into hell.
Matthew 5:27-29
The second heart-deep intensification: adultery, like murder, is committed inwardly first. Tearing out the eye is deliberate hyperbole with a serious edge: treat the causes ruthlessly.
Jesus locates faithfulness in the look before the act, because every betrayal is rehearsed in the imagination before it is performed anywhere else. His prescription is not moderation but amputation: whatever feeds the fire, cut off your access to it.
Practice radical amputation, not vague resistance. The app, the account, the route past temptation, remove it entirely. What you cannot moderate, you can still delete.