Simulation using SITL
You do not need to have a real drone to test Drone-Engage cabapilities. Actually it is recommended to use SITL simulation to test Drone-Engage before actually flying long range with your drone.
If you want more real action then maybe you can try Webots SITL to have a real taste of how using Drone-Engage really feels.
Please check Web Plugin
Adding specific Drone-Engage Features.