Free tools

Small calculators for the money decisions that usually get made on instinct. No signup wall. The maths is on the page and so are the assumptions.

Buy, Build, or Skip

You are about to pay for a tool. This works out whether it pays for itself, whether you could build it in an evening instead, and whether the economics survive real volume.

Four questions, a straight answer, and a receipt you can be held to.

The AI Profit Test

The other side of the same question. You have built something with AI in it. This works out whether it makes money once real customers show up, or whether it can go viral and still lose.

Cost per customer, payback, and what happens at scale.