Mobile Casino Kings publishes the mathematics of casino games and the mechanics of the products built around them: house edge and RTP, variance, bonus wagering terms, licensing obligations, and the controls available to limit or stop play.
Everything on the site falls into one of two categories. Either it is arithmetic, in which case the formula is shown and you can check it on paper, or it is a general description of how a regulatory or commercial mechanism works — the kind of thing that holds across operators rather than being a claim about any one of them.
What we do not publish
No casino reviews, scores or rankings. There are no "top 10" lists here and no operator is recommended, rated or named as a suggestion. Review scores in this category are overwhelmingly a function of commission rates rather than of anything measured, and inventing an assessment of a real business is not something we are prepared to do.
No bonus offers. Promotional terms change constantly and are set by the operator, not by us. What the site provides instead is a calculator that prices any offer you are looking at, which stays useful when a specific promotion does not.
No affiliate links, referral links or advertising. The site earns nothing per player. This matters more than it sounds: a publisher paid per signup has a structural reason to make gambling look like a reasonable financial idea, and this site's central claim is the opposite — that the expected outcome is a loss, by design, and that the useful question is what that loss costs per hour.
No tips, systems or predictions. No staking pattern changes the house edge. Anyone selling one is selling a rearrangement of your results, not an improvement in them.
Editorial stance
The house edge is a fixed toll on turnover. It is not beatable by strategy in the games covered here, it does not go away over time, and it is charged on every pound that passes through a game rather than on what you deposit. That is stated plainly throughout rather than softened, because softening it is the thing that makes most gambling content misleading even when its individual facts are accurate.
Where a figure is standard and well established — the 2.70% edge on a single-zero roulette wheel, the way a wagering multiple converts into required turnover — it is stated directly. Where a figure varies by operator, by game build or by jurisdiction, the site says so and gives you a tool to enter your own number instead of asserting an average that would be wrong for most readers.
The tools run entirely in your browser in plain JavaScript. Nothing you type is transmitted, stored or logged anywhere, and there is no account to create.
Corrections
Errors in the arithmetic are the ones we most want to hear about, and they get fixed first. If a calculator returns something you believe is wrong, send the inputs you used and the answer you expected, and it will be checked and corrected. The same goes for anything factual that has gone out of date — rules and thresholds in this area change, and pages that are wrong get corrected rather than quietly removed. Corrections can be sent through the contact page.
Responsible gambling
18+. This site takes no bets, holds no gambling licence and is not an operator. Nothing here is a recommendation to gamble, and none of it constitutes financial advice.
Gambling has a negative expected value. The longer you play, the more reliably that expectation appears in your balance, and no amount of understanding the maths changes it — understanding only lets you see the price before you pay it. Treat any money staked as money spent.
If gambling has stopped being something you choose freely, free and confidential support is available:
- National Gambling Helpline — 0808 8020 133, run by GamCare, free and open 24 hours a day
- BeGambleAware — information and routes into treatment
- GAMSTOP — free self-exclusion covering every Great Britain-licensed online operator at once
The controls and support page sets out what each of these does in more detail, including bank blocks and device-level blocking software.