A small number of online casinos have mobile apps which you can install on your smartphone or tablet. Most will simply let you access their game library through your phone’s browser.
Apps have the advantage of storing the graphics and basic code for the games on your device. This means that they load faster. It also means you won’t need to wait while bonus games for slots initiate.
The downside of apps is that the game selection is usually limited. While the browser-based casinos can have 100’s of titles, you might only find 30 on a typical app.
I recommend the browser-based games for a different reason – you are not tied to a single casino. With an app you are limited to what one casino has to offer, at least until you download a new casino app. If you play in your browser, you can switch casino with just a click.