Slotometry

The scale

How the Slotometer is set

Every score here is maths you can follow. Both scales sit below, with the weights we actually use and a worked example if you want to check the sum.

Slots

Nobody sits down and decides a game "feels like a seven". Each of the four stats ranks the title against similar games from the 13211 library we track. A crash game never gets lined up against a video slot.

What the colours mean

Three of the four stats are percentile ranks, so 5.0 is bang on the category median — half the pack sits below it. The bar is coloured off that midpoint, with a one-point dead zone either side so a single percentile doesn't flip the call:

ColourMeans
greenMore than a point above the median for its type.
amberWithin a point of the median, either way.
redMore than a point below it.
goldWe're not making that call. See below.

Max win stays gold, even on a 50,000x. A bigger cap is paid for with a thinner hit rate — it's a different kind of slot, not a better one. Colouring that green would be selling you a story the numbers don't back.

RTP consistency is the other odd one out. There's no pack to rank against: it's how far the worst certified version sits below the best, scored as 10 minus the spread in points. Under a point is noise, so 9+ is green. More than two points and you're basically on a different game depending on the casino, so below 8 is red.

StatWeightWhat it looks at
RTP 0.35 Where the return sits against the median for that type of game.
Max win 0.2 Where the win cap sits against the same pack.
Hit rate 0.2 How often it pays, against other games in the same volatility band.
RTP consistency 0.25 How far the lowest certified version sits below the advertised RTP. A single-version game gets full marks.

Why RTP consistency is in the score

Studios certify several returns and the operator picks one. The RTP you see on a review is usually the top file, not the one in that lobby. A game that can be hosted ten points light is, in practice, a different slot — so we score that risk instead of pretending it isn't there.

Missing data doesn't tank a game

If we can't score a stat, we drop it and stretch the remaining weights so they still add up. Unknown isn't treated as zero — that would just punish games we haven't finished documenting. Each score says how many stats went into it.

Same idea on the colours. We only draw a median once we've got at least twenty titles in that pack, and the meter tells you the size. Under twenty, the bar stays gold. A verdict you can't check is worse than no verdict.

Worked example: Le Clubber

Scored on 4 of 4 stats. Weights here are after we stretched them, so the bits add up to the total — last decimal might wobble from rounding.

Stat Score Weight Contribution Basis
RTP 7.7 0.35 2.69 96.34% against a slots median of 96.00% across 13211 titles.
Max win 7 0.2 1.40 10,000x against 13209 other slots titles.
Hit rate 7.2 0.2 1.44 32.47% against 2428 other medium volatility titles.
RTP consistency 5.8 0.25 1.45 3 certified files from 96.34% down to 92.17%, a 4.17 point spread.
Total 7

Open Le Clubber and check the inputs against the page.

Bonuses — the Value Meter

This is modelled EV, not a promise you'll cash out. Expected reward is the headline value minus the house edge on the playthrough, using either the tied game's certified RTP or the video-slot median. Break-even wagering is 1 ÷ house edge — at 96% RTP that's 25×.

StatWeightWhat it looks at
Wagering0.4How heavy the playthrough is versus break-even on the RTP we used.
Expected value0.3What's left after wagering cost, as a share of the headline value.
Cashout cap0.2How much of that headline value you can actually withdraw.
Restrictions0.1Sticky / non-cashable terms, conversion caps, and short wagering windows.

Verdict bands

ScoreVerdict
7.5+Strong
5 – 7.4Fair
2.5 – 4.9Weak
Below 2.5Avoid

Market medians across scored offers: wagering 1.4, cashout 0.2330768504531722.

Casinos

Casinos are scored 0–10 on five things, then multiplied by the weights below. Homepage and slot-page lists are curated; inside the list, the score still sets the order.

CriterionWeight
Licence0.25
Payouts0.25
T&Cs0.2
Support0.15
Games0.15

Licence and payouts carry the most weight. A huge lobby doesn't make up for a thin licence or withdrawals that take a week.

Licence tiers

Used for sorting, and as context on the licence sub-score. Lower tier number is stronger.

TierRegulators
1UKGC, MGA, DGOJ, AGCO
2Isle of Man, Gibraltar
3Kahnawake, Curaçao GCB
4Other / unverified

What has to be on file

A licence score above zero needs at least one licence number. A payout score above zero needs a published withdrawal time and a min or max cashout with a currency. We won't publish those sub-scores without that.

Studios

Studio pages show library maths, not a reviewer's score. The figures come off the games we index and the RTP checks we've logged.

Certified RTP versions per game

Average number of distinct certified RTPs per title we index. More versions means more room for an operator to host a weaker file, so this stays gold — it's a trade-off, not a medal.

Low-RTP rate

On multi-RTP games, how often a casino check matches the worst version (within 0.005 points — same tolerance as the slot pages). We only print a percentage once a studio has 20 of those checks; under that we show the count and skip the rate. When we do print it, higher is worse for you.

Table games

Tables only use two stats, because the data has house edge and RTP spread — not hit rate, max win or volatility. On a thin library most titles won't score at all: house edge needs 20 peers of the same type (roulette vs roulette, not roulette vs blackjack).

StatWeightWhat it looks at
House edge0.6Rank within the same table type. Lower edge scores higher.
RTP consistency0.410 minus the certified RTP spread in points — same idea as slots.

Dispute record

Public cases come off the casino score after the five weighted bits: 0.4 per upheld or partial case, 0.15 per still-open case, capped at 2.0. The summary on the casino page uses the same cases. We're not an ADR body.

What we won't do