Mapster is a platform designed to help businesses measure, understand, and improve product-market fit with precision. Instead of relying solely on lagging indicators like churn, growth stalls, or revenue plateaus, it uses targeted surveys as leading indicators to predict shifts before they affect performance. With its PMF measurement dashboard, companies can identify who their biggest fans are, broken down by geography, customer type, usage patterns, or acquisition channels. The tool provides actionable insights into segment performance, satisfaction, and engagement, helping businesses discover champion user groups, uncover growth opportunities, and make confident decisions about expansion or focus.