Best Slot Apps and Mobile Slots in September 2023

Given how most of us spend a lot of our free time glued to our mobiles, it’s no surprise that playing the best UK slots on phones is now a huge phenomenon. And for good reason – mobile slots are convenient, accessible, and just as fun to play as on desktop.

But what’s the best way to play slots on mobile – on a top casino online via your browser, or on a dedicated app? What are the best slot games to play on mobile? And which slot sites are best to play on iOS and Android? On this page we answer all these questions and more, and we also give some expert tips about playing mobile slots and picking out the best bonuses.

How to Choose Mobile Casinos and Slot Apps

Our casino and slot experts first review every mobile casino and app before recommending them to our readers. This means we sign up to the casino via our mobile or download the app, then check every nook and cranny to make sure it’s legit and worth your time. 

Here are the things we pay close attention to:

• Licensing: Here at Casinos.com, we only recommend slot sites and apps that are licensed by the UK Gambling Commission. This means the first thing we do is carefully check the licensing details of each mobile casino to ensure that it’s legal and follows strict regulations. 
• Security: It almost goes without saying, but we’ll say it anyway: it’s essential that your personal and financial information is safe and the games aren’t rigged. To make sure this is the case, our experts verify that mobile casinos employ the latest security technology and undergo regular audits to ensure fair gameplay.
• Game Selection: Now onto more fun stuff. We take a close look at the variety and quality of the slot games offered by each mobile casino or app. We also consider the reputation and reliability of the software providers they partner with. So a casino could offer the best slots bonus in the UK of all time, but we would only recommend it if it passed these tests with flying colours.
• Compatibility: An operator could have a great selection of slots, but this counts for nothing if it won’t work on your device. To check this, our experts test mobile casinos on various devices, including both iOS and Android, to make sure that the slots are smooth and glitch-free.
• Design and UX: A well designed site can be the difference between a casino that’s a pleasure to play at and one that’s just frustrating to spend time on. Because of this, we look closely at the overall design and user-friendliness of the mobile casino or app. If it's easy to navigate and the games are organised logically, we'll add it to our list. 
• Payment Methods and Payout Speed: Our experts take note of what payment methods are offered to make sure that popular options are included, including options that are particularly suited to mobile players, such as deposit by phone bill. We also check how quickly the casino actually pays out winnings in reality.
• Customer Support: It's important that if you have a question or an issue to resolve, the casino is able to help you quickly. We test this by raising issues via the different contact channels and judging the quality of the response.

In our view, the following mobile casinos are the best to play at now – and they all have apps for iOS and Android just in case you prefer to play on an app.

If you have an Android device and you’re looking for a slot app, you won’t be disappointed by the choices on offer. The Google Play store has arguably the best selection of slot apps out there, which means you should have no problem finding apps to play the latest and greatest slot titles.

But with so many Android slot casinos on the store, how do you pick the best Android slots to play? Well, our experts have created this shortlist to help you get started. They each have thousands of slot games to play as well as other casino games, and they all come with a dedicated (but optional) Android app if you prefer to play on a slots app.

While there may be less choice of slots apps for iOS than on Android, there’s certainly no drop off in quality. In fact, because iPhones and iPads generally have top class components, slot games tend to have exceptionally good graphics and smooth animations, which only adds to the fun.

Our experts have handpicked the following iOS slot sites for you. We believe these are the best Apple slot sites to play at right now due to their amazing selection of games that have been optimised specifically for iOS. You have the choice of playing via a browser or through the app, which you can find at the official App Store.

The Very Best Mobile Slot Games in the UK

Some players prefer mobile slots to playing on desktop, and not only because you can play them wherever and whenever you like. For many slots fans, they are more enjoyable to play, as they often have simpler controls and some games use touch-sensitive buttons and gestures, which makes them more interactive and immersive.

But what makes a great slot game? What are the features that separate a fantastic game from a decent one? Here are a few:

1. Interesting theme: A compelling theme can greatly enhance the enjoyment of a mobile slot game. From ancient civilizations to fantasy worlds, there's a theme to suit everyone’s tastes.
2. Fun storyline: The best mobile slots are a world away from the traditional fruit machines. Slots today try to take you on an exciting adventure that keeps you wanting to get to the next level.
3. Slick graphics: Modern mobile slot games often feature stunning visuals and detailed animations.
4. Nice sound effects: Engaging sound effects, like the spinning wheels and jingles whenever you win, really add to the excitement and immersion of a mobile slot game.
5. Exciting features: Mobile slot games with exciting gameplay features – such as bonus rounds, free spins, wilds, scatters, and multipliers – offer more opportunities for big wins and higher entertainment.
6. High RTP: The RTP (Return to Player) percentage of a game indicates how much a mobile slot game pays back to players over time. A higher RTP means a higher chance of winning in the long run.
7. Volatility: This is the risk and reward level of a mobile slot game. Low volatility games offer frequent but smaller wins, while high volatility games offer less frequent but higher-value wins.

Bearing all that in mind, we asked our most committed slot players here at Casinos.com to come up with their top 10 games to play on mobile. Here is their list of games you have to try.

Mobile slots come in all shapes and sizes, and some of the categories can be a bit confusing at times. Here we break down the basic types to help you decide which ones to try out. 

Classic Slots

These are digital versions of the original 20th-century slot machines. They typically feature a 3x3 grid and simple gameplay with limited bonus features. If you miss the days of playing fruit machines in your local, these are the slots for you.

Video Slots

Video slots online are the most popular type of mobile slots and offer a wide range of themes, graphics, and gameplay features. These modern slots often include bonus rounds, free spins, and multiple paylines, providing an immersive gaming experience.

In our experience, the following mobile casinos have the best selection of video slots to pick from:

There are many types of bonuses offered to players in the UK. Brand new casino sites especially try to dazzle you with amazing offers, but not all bonuses are suitable for playing slots on mobile. 

A no deposit bonus, for example, may sound good as it allows you to play and potentially win money without first depositing any cash. But the reality is often very different. The bonus amounts are usually so small and the wagering requirements (the number of times you have to bet the bonus amount before you qualify to win) are often so high that you will probably struggle to take advantage of it.

In our vast experience of playing slots both on mobile and desktop, the most valuable bonuses to get are a welcome bonus and free spins offer.

Welcome Bonuses: Great for New Players

As their name suggests, these bonuses are offered to welcome new players that are registering to the casino’s slot app or website. And since welcome slot bonuses are available only to new slot apps players, they can only be used once. 

The best casino slot apps combine different types of bonuses in their welcome offer including deposit matches, free spins and more.

The following mobile casinos consistently offer a great casino deposit bonus around:

These days, all online casinos have sites that are highly optimised for mobile, so it’s easy to log into a top mobile casino, pick a slot game, and start spinning the reels using your phone. 

However, some operators have gone a step further by creating a dedicated casino app to play on. So the question is: is it worth downloading any of the real money casino apps out there, or are you better off playing through a browser?

The truth is there’s no right or wrong answer to this question – it’s really a case of horses for courses. But there are some differences worth knowing, so we have summarised them in the table below.

Many people are interested in playing mobile slots for free. But what does that mean in reality? Is the app free, or the game? Can you win money playing a free slot? And what about bonuses like free spins – where do they come into it?

Should You Pay for an App?

First things first – all casino apps should be free. If they are created by a legit online casino (like all those recommended on this page) then the app should be available to download from the official iOS or Android store for no charge. Of course, to win money you’ll first have to deposit cash to play with, but be very cautious about any app that asks for money just to download it. 

Can You Win Money Playing Demo Slots?

Next, you should know that if you play free demo slots on your mobile, you won’t be able to win any real money. You'll be given a dummy bankroll that you can use to stake on the game, but any ‘winnings’ you make when playing are just there to demonstrate what it looks and feels like to play and win. 

Of course, playing free mobile slots is a great way to test whether you enjoy the game without actually risking any money. You can learn the rules of a slot, test out different strategies, and see how smoothly it runs on your device. Just always bear in mind that it’s for fun only.

What Are Free Spins Exactly?

Finally, it’s worth explaining the difference between free spins bonuses and free spins as a feature of the game. If you sign up to a bonus that has free spins, this will give you a few extra spins to use on particular slots, often with a pretty low stake. You can win money using these, although since you first have to deposit money to activate the bonus and then satisfy the wagering requirements before you can claim any winnings, it’s a bit of a stretch to call the spins truly ‘free’.

Free spins as part of an in-game feature, however, cost no extra money. Whether you can win money using them depends on whether you’re playing a demo or real money version of the game, however.