There isn’t a standalone Astronaut App in the App Store or Google Play because it’s a casino game, not an independent app. However, many casinos that offer Astronaut have their own apps you can download which include the game. Alternatively, the browser version works so well on mobile that you don’t really need a dedicated app. Some casinos offer Progressive Web Apps (PWAs) which you can add to your home screen – they work like native apps but don’t go through app stores. These PWAs give you one-tap access and can even work offline for demo mode. The advantage of browser/PWA play is you’re not tied to one casino’s app and can play across multiple platforms. The mobile browser experience is fully optimized with touch controls, responsive design, and low data usage. I’ve tried both casino apps and browser play – honestly browser works just as well.