Look into making your app a Progressive Web Application (PWA). PWAs run in/on both desktop and mobile Chrome based browsers which dominate the web. And depending on use case (e.g. single-user apps or games) PWAs can be setup to run completely offline further emulating "native" mobile apps.

Just 2 of several PWA benefits: - You can publish and host PWAs almost anywhere. No playstore required. But the option to go the playstore route remains open to you as playstores do accept PWAs. - Done right a single code base, because it runs in the browser, just works on desktops and mobiles, while you still have the ability to modify app behavior based on the platform you can detect at run time.