It works very well and you can save a lot of detailed information about each Pokémon ! Its like having your own Pokédex!
Pokémon HOME is an official Nintendo application that allows you to save all your Pokémon in the cloud. The two main advantages of this service is that it allows you to have all your Pokémon well organised and that you can also share them with other people.
The structured storage of Pokémon Home helps you to have them all in one place regardless of the game in which you got them, as long as they belong to the main series. Once saved within the app, you can transfer them to other games such as Pokémon Sword or Pokémon Shield.
This application is not just a simple storage "box", but through it you can contact players from all over the world and exchange Pokémon.
Pokémon Home is also available to download for iOS devices from the Apple App Store.