You're looking for an app that charges you money if you relapse. That's not a weird thing to want; it's one of the oldest ideas in behavioral economics, called a commitment device: bind your future self now, while you're motivated, so the weak moment has a price attached.
The good news is these apps exist. The better news is the evidence behind them is real. Here's the landscape.
Why a financial consequence works when willpower doesn't
Loss aversion is one of the most replicated findings in behavioral science: losing an amount of money feels roughly twice as bad as gaining the same amount feels good. Deposit-based incentive studies, including workplace smoking-cessation trials published in the New England Journal of Medicine, consistently find that people with their own money on the line quit at meaningfully higher rates than people offered rewards alone.
The mechanism is simple. An urge is a fast, emotional calculation: will anyone know, and does it cost anything? Willpower tries to argue with that calculation and usually loses. A financial consequence doesn't argue; it changes the numbers. More on the evidence in does paying money help break habits?
The apps, compared
Pledgely is built specifically for quitting porn, and it's the only one here where the consequence is wired directly into a blocker. It blocks porn system-wide on Android through a local VPN, and you set a daily pledge of $1 to $100. The pledge is charged only if you deactivate the blocker: pause it, turn the VPN off, or remove device admin in Hard Mode. Keep it on and every daily hold is released back to your card. Nothing you browse is logged, and slips on blocked pages cost nothing because the pages simply don't load. The "relapse" that costs you is precisely the one action that enables relapse: removing your own protection.
stickK pioneered commitment contracts: define any goal, put money on it, name a referee who confirms whether you succeeded, and pick where forfeited money goes (an anti-charity, a cause you dislike, stings extra). General-purpose and web-first. For porn specifically, the weakness is verification: your referee only knows what you tell them. See stickK alternatives.
Beeminder charges you when you go off track against a data-driven goal, with the amount escalating after each derailment. Brilliant for measurable goals (steps, writing, screen time via integrations). Porn abstinence isn't automatically measurable, so you're back to self-reporting.
Forfeit has you set tasks with photo or verification-based proof and charges you on failure. Great for gym sessions and morning routines; awkward for proving a negative like "didn't watch porn today."
The verification problem, and why blockers solve it
Every general-purpose commitment app hits the same wall with porn: how does the app know you relapsed? Self-reporting collapses exactly when you need it, because the person doing the reporting is the person mid-relapse.
Pledgely sidesteps this entirely. It never needs to know what you watched, and it never tries to find out. It watches one objective, machine-verifiable event: is the blocker on or off? You can't argue with it, forget to log it, or lie to it. That's the design reason a purpose-built tool beats a generic contract here, the same reason accountability without a partner beats accountability that depends on confession.
Setting the amount
One rule: the pledge must be big enough that your 2am self refuses to pay it, and small enough that a genuine emergency deactivation wouldn't wreck you. For most people that's somewhere between $10 and $50 a day. Start where it stings, adjust after your first week.
Next: Does paying money actually help break habits? The evidence
Put real stakes behind quitting
Pledgely blocks porn across your whole Android phone and charges your own pledge only if you turn the blocker off. Stay clean, pay nothing.
Get Pledgely on Google Play