What is the difference between API 1 and 2?

[sergiop]

Please, could someone explain what are the main differences between the two versions of the API?

[seanblue]

API v2 contains a ton of more data, so you can do a lot more. It also provides (optional) write access, so you can start lessons and do reviews via the API.

[Kumirei]

V1 is a Ford Model T
V2 is a Tesla Model 3

[plantron]

V1 is @plantron
V2 is @Kumirei