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Four tools promise a real-time answer before the pause gets awkward. Here's what each is actually good at, and what an hour of real help costs on each.

Most AI mock interview tools are a question generator with a score bolted on. Here's what actually separates a useful one, and what a good round looks like.

The tech behind real-time interview help, what happens between a question landing and an answer appearing, and what actually separates a useful tool from a gimmick.

Where the term comes from, what a copilot actually does differently from an interview-prep app, and honest answers to the questions people actually ask about using one.

Before you build, check if the idea actually makes money. These three tools show you real revenue, App Store numbers, and why winning apps get downloaded.