Marketing tools that don't flatter your numbers.
Free, no-sign-up calculators for founders and marketers — built the way we think about marketing: measure honestly first, then decide. Everything runs in your browser; your raw input values stay on your device.
Plan & budget
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Ad Spend Profitability Calculator
Break-even ROAS, the most you can profitably pay per customer, and profit after ads.
Performance marketers · ~1–3 minNeeds: Order value, margin/costs, CAC
Open tool -
LTV : CAC Calculator
Lifetime value, LTV:CAC ratio and payback — by business model.
Founders & growth · ~2 minNeeds: Order value/ARPA, retention, CAC
Open tool
Optimise conversion
Run an experiment
Track & measure
No tools match those filters — clear one to see more.
Some tools compare your numbers against industry benchmarks — see exactly where those come from and how we source them
Everything runs in your browser: your raw input values stay on your device. Anonymous, banded usage data may be recorded to understand how the tools are used.
Numbers are only as honest as the tracking behind them
These tools assume your inputs are real. If your CAC, ROAS or conversions are mismeasured, the outputs will be too. A Foundation Audit checks the tracking underneath — so the numbers you plug in actually mean something.
Discuss your growth project