How to choose a quadcopter?

Question

Quadcopter

Hello. Please tell me which quadcopter should I choose. Requirements - modularity and availability of api, lack of binding to the manufacturer's services (like apple), cost - within $ 400. Parrot is not liked because of js and "appleness". As an option - dji f450 / f550. But then you need to choose a flight controller.

Answer 1

You can take a closer look at the pixhawk, collect it already. Good controller, lots of features