CheckFast

CheckFast helps founders check whether a product idea is worth building before they invest time in it. A user enters a brief description of their idea, and the tool analyzes Google search data to estimate demand and financial viability in roughly 20 seconds. Output includes total addressable market (TAM) size, estimated customer acquisition cost (CAC) and lifetime value (LTV), monthly search volume, cost-per-click, and a competition score, plus a return-on-ad-spend (ROAS) estimate. Results are also compiled into a profit-and-loss statement delivered as an Excel file with dynamic formulas, so a founder can adjust assumptions like pricing or ad spend and see how the projected numbers change. The tool is built for validating a range of business types, including SaaS products, e-commerce stores, and local services, and it is aimed at solo founders and small teams who want a data point on market interest before committing to fully building a product. Because CheckFast's analysis is derived from search-volume and keyword data rather than direct customer interviews or real sales, it is best treated as an early directional signal about demand rather than a guarantee that a product will succeed once built.