Absolutely for free: The flight tracker
For all the information and the fun that the flight tracking offers to you, you do not pay a single cent, it’s definitely free. You do not have to install any expensive computer programs, or sign in any subscriptions or memberships. While many airlines offer their own flight tracker / flight information, but only for their own airline and not with the detailed information, that gives our flight tracker to you. You can use the flight tracker not only on your computer, but you can also use the smartphone to track online and live flights over the flight radar at any time.
This is quite convenient when you are using it e.g. to pick up someone from the airport. So you know exactly if the flight is on time and exactly when the plane lands.
You can also watch the launch of an aircraft. Just zoom in to the airport and click on the desired aircraft. If you continue to zoom out of the radar, you can observe the entire airspace in this environment. Especially at large airports, airplanes are starting and landing continuously. You will be aware of the fact that air traffic is also a very heavy traffic. This is how you can use the flight tracker to track traffic. And you can see what a logistical challenge it is to keep an overview and to control everything.