100% free, no signup

Free tools for SaaS founders

The metrics every subscription business runs on: MRR, churn, lifetime value, and acquisition cost. Each calculator runs entirely in your browser and comes with the formula, a worked example, and benchmarks that admit their own limits. No signup, no data collected, nothing to install. Use them to know your numbers, then use IdeaFast to decide what to build next.

SaaS metrics calculators

The four numbers that decide whether a subscription business works.

Metrics tell you how it is going. Not what to build.

IdeaFast finds real pain points in the communities where your customers complain, scores them, and links every claim to the original thread. Browse the free ideas database or run your first scan free.