HS Easy Fly is a free iPhone application developed by HOLY STONE TECHNOLOGY Co.Ltd. It falls under the category of Utilities & Tools and offers users the ability to control a toy quadrocopter through a WiFi connection.

The main feature of HS Easy Fly is its real-time video transfer capability. Users can see live video footage from the quadrocopter's camera directly on their iPhone screen, allowing for an immersive and interactive flying experience. This feature adds an extra layer of excitement and control to the toy quadrocopter.

With HS Easy Fly, users can easily navigate and maneuver the quadrocopter using the intuitive controls provided by the application. The WiFi connection ensures a stable and responsive connection between the iPhone and the quadrocopter, enabling smooth and precise flight control.

Overall, HS Easy Fly provides a fun and engaging way to control a toy quadrocopter, enhancing the flying experience with real-time video transfer. It is a great choice for those looking to explore the world of remote-controlled quadrocopters.