Yes, apps made with Needle Engine can be configured to run offline by turning them into Progressive Web Apps (PWAs), or by embedding them in native frameworks like Flutter.

With a single line of code, you can turn your app into a PWA, which allows it to be run offline and even be installed on devices. This is done by leveraging the browser’s capabilities to cache assets and serve them locally - battle-tested technologies that most browsers have adopted. Service workers and the Cache API allow fine-grained control over what gets cached and when, so you can ensure that your app is always available, even without an internet connection.

Here’s the concept:

1. You enhance your Needle Engine web project with PWA capabilties. This adds a Service Worker and a Web App Manifest.
2. When a user visits online for the first time, the Service Worker installs and caches the app’s assets.
3. On subsequent visits, even without internet, the Service Worker serves the cached files, enabling offline operation. The PWA can also be installed by users for easier access.
4. If needed, this PWA can be wrapped in a native app container (like Tauri, Electron, Capacitor or Trusted Web Apps) for distribution through app stores.

Learn More: Creating a PWA for Needle Engine Learn More: PWABuilder for App Store distribution