I am new in the drone world and I am still trying to understand the relationship of some of the apps I see mention here. How is DJI Assist used? How is DJI Light Bridge used for? How is DJI Clean used? What does Kutchi do? I saw hack mentioned in one discussion to set the channel to be used. What is that and what is it used for? Do any of these take the place of something else or each other? Thanks in advance for any help offers.