iDrone is not free. It has a shop and uses In-App purchase to sell items. The first drone and the Target Practice mission are free so you can decide if you want to support the App prior to purchasing more.
iDrone is a UAV simulator that allows you to control an unmanned aerial vehicle, flying over a 3D city scape or a mountain terrain on your Mac.
iDrone features a target practice mode where you control the vehicle and destroy targest placed randomly throughout the city.
iDrone features a mission mode where you have specific goals to achieve and specific targets to destroy located throughout the 3D city scape or mountain terrain. There are 4 missions.
iDrone has 4 different UAV Drone models with different weapon payloads and speed characteristics.
iDrone allows you to configure sound effects volume, music volume, visibility of target beacons, and unlimited missiles.