GX-FPV is a free Android app developed by GuanZhi Technology that allows you to control your 4-axis aircraft with your smartphone via WiFi. In addition, it offers the ability to capture real-time video from the aircraft, take photos, and save videos directly to your device.

The app's interface is user-friendly and easy to navigate, allowing you to control the aircraft's movement with ease. The real-time video feed is clear and responsive, providing an immersive flying experience. The app also features a photo and video capture function, allowing you to easily document your flights and share them with others.

Overall, GX-FPV is a great app for those interested in flying 4-axis aircraft. Its user-friendly interface and real-time video feed make it a must-have for any drone enthusiast.