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Resources

Free growth tools for founders

The calculators and templates we use every day, free and without signup. Run the numbers, copy the templates, fix the leaks.

Calculators

K-factor calculator
Measure your viral coefficient and project growth cycle by cycle.
A/B test significance calculator
P-value, uplift and a clear verdict, the same z-test our product runs.
Churn and LTV calculator
Turn monthly churn into customer lifetime, annual retention and LTV.
CAC payback calculator
How many months before an acquired customer turns profitable.

Copy-paste templates

AARRR audit checklist
25 questions to find the biggest leak in your funnel, stage by stage.
Growth experiment template
One page from hypothesis to verdict: ICE score, sample size, learning.
Weekly growth review template
The 30-minute ritual: metrics vs. targets, experiments, blockers, bets.
Growth glossary
30 growth terms defined clearly, with a concrete example for each, from k-factor to CAC payback.
Browse the glossary
Growth blog
Deep dives on growth loops, retention and experimentation, the long-form companion to these tools.
Read the blog