Free tools

Tools you can actually use.

A free toolkit I reach for in growth, product, and AI work. Every one runs in your browser, needs no signup, and stores nothing. Pick a question and get an answer in seconds.

Experimentation & conversion

A/B Test Significance Calculator

Is that result real, or just noise? Get the p-value and verdict.

Open tool

A/B Test Sample Size Calculator

Find out how much traffic a test needs before it can conclude.

Open tool

Funnel Drop-off Calculator

Pinpoint the exact step where you leak the most people.

Open tool

Growth & pricing

LTV:CAC & Payback Calculator

Are you actually making money on each customer you acquire?

Open tool

Discount Breakeven Calculator

A 20% discount can need +67% volume just to break even. See yours.

Open tool

Affiliate & partnerships

Affiliate CPA & Margin Calculator

What an affiliate order really costs, and what it leaves behind.

Open tool

Partner Concentration Risk Checker

How exposed is your channel if one big partner walks?

Open tool

Product & strategy

RICE Roadmap Prioritizer

Rank your roadmap live, so the loudest voice stops winning.

Open tool

Market Sizing Calculator (TAM/SAM/SOM)

Size a market or an expansion opportunity in seconds.

Open tool

AI & LLMs

AI Model Selector

Claude, GPT, or Gemini? Answer three questions, get a pick.

Open tool

LLM API Cost Calculator

See what an AI feature costs at scale before you ship it.

Open tool

The thinking behind these lives in the resources blog. Want one built for your own workflow? Get in touch.