The SaaS operator's
free toolkit
Calculators and quizzes built for operators who need numbers fast. Everything runs in your browser — no signup, no fluff.
Core calculators
Monthly and annual churn, revenue lost, and a simple health score — all in one view.
See revenue at risk from failed cards and your recovery opportunity before it churns.
NRR, GRR, and benchmarks for bootstrapped, growth, and enterprise SaaS companies.
LTV, Dunning, Runway & more
LTV, LTV:CAC, payback period, and how 1–2% lower churn compounds your LTV over time.
Generate a four-email dunning sequence tailored to your tone and retry cadence.
Project MRR with churn, breakeven, runway, and a Chart.js growth trajectory.
Eight questions, a score out of 16, and rule-based pricing improvement recommendations.
Split failed-payment churn from cancellations and size your recoverable revenue.
Grade your cancel flow A–F with ten yes/no checks and specific fixes to stop the leak.
Want to fix the leaks automatically?
RetainFlow recovers failed payments and reduces churn on autopilot — for bootstrapped SaaS founders.