The main thing that you will need is a relatively new IOS or android device. Usually you can use any iPad or iPhone made in the last 3 years. However, some drones don’t have controllers that were designed to hold tablets, so keep that in mind. If you’re buying the bugs 3, you won’t need a smartphone since it doesn’t have a built-in camera that you can control. All of the drones in this list come with batteries, chargers, controllers (if needed), extra propellers, and anything else you might need to go for your first flight.
On the other hand, ATTI is a partially different tool, whereby the quadcopter uses other techniques and not necessarily external sensors to firmly hold the drone in correct altitude and orientation. ATTI allows the drone to hover in place, as well as to gently drift around while being pushed by the wind. Some drones also have GPS which offers great precision and coordination during flight.

While DJI may be the first name you think of when it comes to drones, it isn't the only game in town. You can also look at models from Autel Robotics, Parrot, PowerVision, and Yuneec. Others have dabbled in the consumer drone space and exited quickly—GoPro pulled its Karma after a rocky launch and poor sales, and 3D Robotics tried to get in with the Solo, but also gave up the fight to focus on the industrial and enterprise spaces.
Irrespective of the dimensions of your quadcopter, they must not go higher than 400ft above the ground. Likewise, you must always maintain a clear line-of-sight with the machine at all times. You are also expected to adequately inspect your device before each flight session, to ensure its readiness and airworthiness. This is necessary to prevent unnecessary flight accidents.  
This drone is based on a design that is a few years old, so it does not have an altitude hold function. However, it does feature a headless mode and a one-key return to pilot function. It can also perform flips at a push of a button, which is fun to watch and perform. To help with orientation with night flying, this drone has blue LEDs at the front, and red LEDs at the back.
The drones we review are ready-to-fly models, so you can use them right out of the box. In most cases, you'll need to bring your own Android or iOS device to view the camera feed in real-time, but we've reviewed a few models that stream video directly to a remote control. We don't cover racing, industrial, or agricultural aircraft here—our focus is on aircraft intended for aerial imaging and videography.

Another big addition is Spark’s obstacle avoidance system. While the ability to sense and avoid objects is usually a feature reserved for larger drones, DJI went ahead and built one into the hull of the Spark. It’s not quite as robust as what you’ll find on the Phantom 4, or even the Mavic Pro, but it still serves its purpose, and helps you avoid crashes.
If you are a beginner just learning to fly with these cheaper drones, take your time to learn the controls by flying in a safe area that is a wide open space, with no wind, and no obstacles. At first, fly low to the ground until you can maneuver your drone correctly. Practice flying on a single battery charge and then let the drone cool down for ten minutes before flying more.