The Bidding Decisions portion of Lead Captain has two modes of operation - Easy Mode and Tech Mode.

Here's an example of the type of problem that can be solved in Easy Mode. With standard bidding methods, assume the bidding has gone 1♣(by partner)-1♠(reswponse by you)-2♠. Holding the following hand should you invite or not?

Partner probably has 4 spades, at least a few clubs, and 12-16 Total Points (points in support of spades). Despite having a minimal hand, Lead Captain says South should invite game, but only when vulnerable. By inviting game, as oppose to passing 2♠, you can expect to win 0.11 IMPs per board. When not vulnerable, you can expect to lose 0.44 IMPs per board. Of course these are double-dummy results and you might get a friendly lead at the table.