Two public sources, both credited. Steam provides a game's price, release date, and review counts; SteamSpy (used under CC BY-NC) adds its owner estimates and the by-tag samples behind the genre reports. wishvane turns those into copy and revenue estimates. It never uses private or scraped data, and it never shows a number it cannot source.
They are estimates, and wishvane labels every one. Copies come from a review-count proxy, so read them as a range, not a receipt. Revenue is shakier still: it multiplies the copies estimate by list price and takes Steam's roughly 30% cut, so it stacks one estimate on top of another. Good for sizing a genre's realistic ceiling, not a substitute for a game's actual sales figures.
No, and anyone who claims they can is guessing. wishvane tells you what a genre realistically produces: what a typical game does, what the top of the genre does, and where the money tends to land. Whether yours beats that comes down to your game, your marketing, and some luck. It sizes the opportunity; it does not predict your outcome.
It is free, and no. You can look up any game or genre and size up your own concept without signing up. Your comparison lives in your browser, so you can come back to it, and share it with a link, without an account.