This is so convenient to use and very detailed when you are creating a character. You can pick every little characteristic that the character will have.
The app would help you build your character for the game and you can simulate what to use on the game itself. Like you can be a scientist, in the military, etc. Like role-playing and you can have certain skills and intelligence levels to pick from.
It was very helpful in viewing your stats and making a record for your character sheet and keeping track of your characters. However, the free version only has one available character to store.
If you want more characters, then upgrade to companion pro for unlimited characters that you could use and add more contractors and keep track of them. I just wish they would add two more to the free version to lure other players.