It matters to say this plainly and first: Mr. Grummel is a general-purpose focus app, and it is not a substitute for formal gambling self-exclusion. Self-exclusion schemes exist specifically because problem gambling requires a barrier that can't simply be answered past by the same person trying to quit — and a quiz question, by design, can always be answered. Anyone here specifically for gambling should treat this page as a signpost to the real tools, not as one of them.
What actually works for this
Formal self-exclusion schemes — GAMSTOP in the UK, which blocks access across all UK-licensed online gambling sites at once, GamCare's support services, and the National Gambling Helpline are built specifically for this and involve a real barrier that isn't within the excluded person's own control to lift on a whim, which is precisely the property that matters and precisely the property a self-directed quiz-gated blocker doesn't have. It's worth noting these schemes are specifically designed with the self-defeating nature of gambling urges in mind — GAMSTOP, for instance, applies a minimum exclusion period that cannot be shortened even if the person who signed up later asks to, which is a deliberate design choice recognizing that the urge to gamble again is often strongest precisely when someone would otherwise want to reverse their own exclusion. Similar self-exclusion frameworks exist in most jurisdictions with regulated gambling — worth searching for the specific national or regional scheme where you are if outside the UK, since GAMSTOP itself only covers UK-licensed operators. A short search for the equivalent local scheme is worth doing directly rather than assuming none exists. It's a search worth doing before assuming a general-purpose blocker is the only option available locally. They also tend to cover multiple channels at once, online and in some regions retail betting shops too, which a phone-only tool never could.
Why a quiz-gated blocker specifically doesn't fit
The entire mechanism here is that the person using the blocker can always get back in by answering three questions correctly — that's a reasonable trade-off for a focus tool where the goal is friction, not prohibition, but it is exactly the wrong property for gambling self-exclusion, where the whole point is a barrier the person in the moment of urge cannot simply remove themselves. It's worth restating why that distinction is not a minor technical detail here: the entire value of a self-exclusion scheme lies in the person not being able to undo it in a moment of urge, and a tool where undoing it just requires answering a multiple-choice question offers essentially none of that protection when it matters most. That gap is precisely why professional, purpose-built schemes exist in the first place — they're designed by people who understand this specific failure mode, not adapted from a general-purpose focus tool never built with it in mind. That barrier is the entire point, and nothing about a general-purpose app can replicate it responsibly.
The honest fit
There genuinely isn't one for the core self-exclusion need, and this page is written to say so directly rather than let a search result imply otherwise. Anyone landing here searching for a way to stop gambling should leave this page and use one of the resources above instead. This page exists specifically to interrupt that search result with an honest redirect rather than let ambiguity stand in for false reassurance. Anyone who found this page through a general search for gambling apps or gambling blockers should treat the resources above as the actual next step, not this product. Directness matters more than politeness when the stakes involve someone's financial and emotional wellbeing. Clarity matters more than softness when the stakes are this real. That plain honesty is worth more here than a softer, more marketable answer would be.
Where a general blocker might help at the margins
For a milder pattern — noticing you're opening a gambling app out of pure habit and want more general friction around phone use overall — a blocker could theoretically play a small, secondary role, but never as a primary safeguard, and never as a replacement for formal self-exclusion or professional support if the pattern is more than mild. If in doubt, use the real resources first. Family and friends affected by someone else's gambling can also find support through GamCare and similar organizations, which is worth mentioning since problem gambling rarely affects only the person gambling. The National Gambling Helpline offers confidential support around the clock, and reaching out is a reasonable first step regardless of how severe the situation currently feels. Reaching out costs nothing and doesn't commit anyone to a particular next step beyond that first conversation. No one needs to have hit a particular threshold of severity before reaching out is worthwhile. Support is available at any stage, whether the pattern feels mild, moderate, or already serious.