Slot providers on mobile
The studios behind the games in UK casino apps: who they are, their signature mechanics and how their slots play on a phone.
By the Best Casino Apps UK team. Last checked .
Slot providers on mobile: who makes the games in your app
Casino apps rarely build their own games. The slots, table games and live tables in a UK app come from specialist studios, known as providers, which license their games to many operators at once. That is why the same title can appear in five different apps with the same features. The provider designs the maths, artwork and mobile layout; the casino decides which games to carry and, where a game has several RTP versions, which one to run.
Knowing the studio behind a game tells you a lot before you spin: whether its slots tend to be designed for portrait play, what kind of bonus rounds to expect and how volatile its games usually are. Each provider page below explains this for one studio.
Some studios supply games directly, while others reach casinos through a larger partner's distribution platform. Reel Kingdom, for example, releases its Big Bass games through Pragmatic Play, so they often sit under the Pragmatic name in an app's provider filter. Live dealer games come from separate live studios that stream real tables to your phone.
How to use the provider guides
The studios are listed A–Z. Each guide covers who the provider is, where it is based and which group owns it where that could be verified, its signature mechanics, its best-known slots with links to our game guides, how its games behave on a phone and how to find them in an app's lobby. Most apps let you filter or search by provider, usually from a menu icon above the game grid.
Many well-known studios now sit inside a handful of large groups, which helps explain why some mechanics turn up across apparently unrelated brands.
| Group | Studios in the group | Known for |
|---|---|---|
| Evolution | NetEnt, Red Tiger, Big Time Gaming, Nolimit City | Live casino, Megaways, Starburst |
| Playtech | Quickspin, Eyecon | Age of the Gods jackpots, Fluffy Favourites |
| Light & Wonder | Barcrest, Lightning Box | Rainbow Riches |
| Novomatic | Greentube | Book of Ra Deluxe |
| Pragmatic Play (distribution) | Reel Kingdom | The Big Bass series |
Studios A–Z
How different studios' games run on phones
Nearly every current slot is built in HTML5, so it runs in an iPhone app, an Android app and a mobile browser without a separate version. Differences between studios show up in design choices. Pragmatic Play has many recent games that switch to a portrait layout on phones, with the spin button near the bottom edge. Older NetEnt classics such as Starburst keep a wide reel set that many people find easier to read in landscape. Big Time Gaming, the studio behind the Megaways mechanic, packs a lot of symbols onto the screen, which is easier to follow on a larger phone.
- Older games from studios with long back catalogues can load more slowly on budget phones.
- Live casino providers such as Evolution stream video, so their games use far more data than RNG slots.
- Studios focused on high-volatility games, such as Nolimit City, often state very large maximum wins; read the paytable for how rarely they occur.
Provider RTP settings and the UK rules they must follow
Most large providers offer each slot in several RTP versions, for example a top version and one or two lower ones. The studio's own website usually publishes the highest figure, and the casino picks which version goes live. The only reliable number is the one in the game's help screen inside your app; our guide to finding a slot's RTP in an app shows where it sits.
Providers supplying games to Great Britain must hold a Gambling Commission licence and build UK versions that follow local rules: no autoplay or turbo, at least 2.5 seconds per slot spin, stakes capped at £5 for adults aged 25 and over and £2 for those aged 18 to 24, and no feature buy. A studio's promotional video filmed for other markets may therefore show options you will not see. The rules are summarised in our UK slot design rules guide.
Choosing games by provider
Picking a provider is a sensible shortcut if you have found a game you enjoy and want something similar. Check three things on its page: the typical volatility of its games, the mechanics it repeats, and whether its slots are designed for portrait or landscape. Then search the provider in your app and compare RTP versions before you play. Our slot guides cover individual games in detail, and Megaways slots apps collects one popular mechanic across studios. Whichever studio you choose, the house edge applies to every spin.
- Like steady, frequent small wins? Look for studios whose catalogues lean towards low and medium volatility and classic paylines.
- Prefer big-feature games? Studios known for multipliers and cascading reels tend to be more volatile, so lower your stake to stretch a budget.
- Playing one-handed on a commute? Favour providers with portrait layouts, which keep every control within reach of your thumb.
- Short of data? RNG slots from any studio use far less than live dealer games.
Frequently asked questions
What is a slot provider?
A slot provider is the company that designs and builds casino games and licenses them to operators. The provider creates the maths model, graphics, sound and mobile layout, and supplies the game through a platform that casinos connect to. The casino then chooses which games to list and which RTP version to run. Providers serving Great Britain need their own Gambling Commission licence. That is why the same game looks identical across several apps. Our how casino app games work guide explains the technical side.
How do I find games from one provider in a casino app?
Most apps have a filter or search option in the games lobby. Tap the search icon and type the studio's name, or open the menu above the game grid and choose a provider filter if the app offers one. Some apps list providers as a row of logos you can tap. If the studio is not listed, the casino may not carry its games. Our guide to finding games in a casino app describes the usual menus on iPhone and Android.
Do all providers have the same RTP?
No. Each studio sets its own RTP for each game, and many offer several versions of a slot at different levels. Published figures typically range in the mid-90s, but the casino decides which version to run, so the same game can return different amounts in different apps. The figure in the game's help screen is the one that applies. Check it before you play and compare if it matters to you. Our RTP glossary entry explains what the percentage means in practice.
Which provider makes the most popular slots in UK apps?
No single studio dominates, but a few names supply many of the best-known games. Pragmatic Play distributes the Big Bass series from Reel Kingdom along with Gates of Olympus and Sweet Bonanza. NetEnt made Starburst and Gonzo's Quest, Play'n GO made Book of Dead, and Blueprint Gaming is behind Fishin' Frenzy. Popularity shifts with new releases. Our Play'n GO page shows how one studio's catalogue translates to mobile play.
Are slots from smaller providers safe to play?
Yes, provided the game appears in a UK-licensed app, because the operator may only offer games from suppliers licensed by the Gambling Commission and tested to its standards. Smaller studios often focus on unusual mechanics or higher volatility, so read the paytable and rules screen first. The licence covers fairness, not how much a game pays, and losses remain likely over time. Our guide on how casino apps are tested explains the checks behind every game.
Why does a provider's video show features my app does not have?
Studios often film promotional videos for several markets, and some features are banned in Great Britain. Feature buy, autoplay, turbo spins and stakes above £5 a spin are all missing from UK versions of games. The core features, such as free spins rounds, wilds and multipliers, work the same way. If a video shows a buy button or quick-spin toggle, it was not made for UK players. Our glossary entry on autoplay explains when the ban began.