Online casino rating systems explained by experts at JohnSlots
February 19, 2025
Reviewing online casinos can be a very in-depth process. It might not seem that way to people on the outside, but a lot of research goes into every single online casino review. The best online casinos have a lot going for them, and customers are rightfully becoming more discerning. That’s why casino rating systems are as elaborate as they are.
To help shed some light on this important process, here are the top factors that go into an expert analysis of an online casino rating system:
Game quality
Perhaps the most important part of the JohnSlots rating system is the quality of the games available. This is a very broad category, so it incorporates many different facets of online casino games.
At JohnSlots, for example, online casino games are graded on multiple factors pertaining to min and max bet amounts, volatility, the RTP, the uniqueness of the game mechanics, and any bonus or special features. These are the more quantitative features that go into these rating scores, but subjective features are taken into account as well, such as the theme, the graphics and the audio.
Game library
Game quality isn’t all that matters. Game quantity does too, and it matters greatly if you’re judging the casino as a whole. This can refer to the sheer number of games that are available, or the different types of games that are on offer as well.
In general, the more the merrier. The best online casinos tend to not only have hundreds of different games but many different game formats too. This includes slots, blackjack, baccarat, poker and streamed video table games with interactive elements.
Online casinos tend to get bonus points if they have any exclusive titles that can’t be found elsewhere, thanks to partnerships or deals with select software providers.
Welcome bonuses (and other promotions)
The best online casinos always have enticing bonuses. Welcome bonuses that offer free slot spins or cashback up to a certain amount are the most popular, but other promotions are taken into account as well. This can include VIP or loyalty programs, monthly lotteries, and other exclusive offers.
No deposit bonuses are especially important, as they are great at attracting new customers thanks to the low barrier to entry.
Payment methods
Choosing a casino with compatible payment options is always important for any customer, so online casino rankings take this element very seriously. Just like with games, you want your online casino to have as many payment options as possible.
The major credit cards – Mastercard, Visa and American Express – should be available, but there should also be room for the major e-wallet services and cryptocurrencies, particularly PayPal, Bitcoin and Ethereum.
Payment speed
Like payment options, payment speed is very important for online casino players. When you strike it big, you want to continue riding that high and get your money withdrawn as soon as possible. Unfortunately, payment speeds not only vary widely from casino to casino, but also by payment option. That makes this an especially important factor for the most particular of online casino fans.
Many casinos will have instant deposits, depending on the method. What expert reviews tend to pay most attention to is the withdrawal speed, as this is likely to be slower than the depositing method. If an online casino has a withdrawal speed of 24 hours or less, this is widely considered a green flag.
Security and privacy
Cybersecurity is more important than ever, which is why you should only ever opt for an online casino that is regulated, licensed and well respected by the gambling community.
Online security can be a broad subject, but in the world of online casinos, it tends to refer to SSL encryption, two-factor authentication and an identity or profile verification process.
Customer service quality
If you plan on staying at an online casino for an extended period of time, you will definitely want that place to have top-notch customer service. This can make all the difference between an excellent online casino and a decent one.
This means fast response times, multiple avenues of contact (social media, email, phone, chatbots) and 24/7 service. Just as a good customer service team is great for keeping people, a bad one is bad for business. That’s why it should come as little surprise that many of the most successful online casinos put a lot of effort into their customer service responses.
As a bonus, many online casinos will include a comprehensive FAQ section that addresses the most common concerns.
Mobile app quality
The last thing expert analysts take into account is the quality of the mobile app of the online casino, if available and applicable. More people are doing their online gambling on the go or on portable devices, so it is very important for an online casino to have a mobile version of some kind that is responsive, polished, devoid of bugs and looks good on a small screen.
The mobile app or site should have a UI that is legible and easy to follow, as well as display its games in a non-cluttered fashion. If an online casino can provide these things, you’ve found a winner.
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