Free to fly. Pay only to scale.

No. CrossFly apps are written in standard Java. If you know the Java API, you already know how to build with CrossFly — same syntax, same tooling, same ecosystem.

CrossFly keeps you in Java (no Dart, no JS), runs on a LibGDX GPU rendering core for exceptional performance, and targets Android, iOS, Desktop (Windows, macOS and Linux) and the web (Chrome, Firefox, Safari and other browsers) from one codebase.

Android, iOS, Desktop (Windows, macOS, Linux) and the web (Chrome, Firefox, Safari and other browsers) — all compiled from the same Java source with a single build command.

Yes. The framework is open source under the Apache 2.0 license and free forever. Paid plans add support and team tooling, not core features.

In most cases, yes — you have access to the Java ecosystem you already rely on, which is a major advantage over Dart- or JS-based frameworks.

About a minute. Install the SDK, write a Window class, and run — your first multiplatform app is live before your coffee gets cold.