Build fast. Prove faster.

A first-wallet reality check for builders using new coding tools. Score the evidence behind your idea instead of treating a market headline or a polished prototype as demand.

Evidence scores

Use 0 for no evidence and 5 for strong evidence. These are your assumptions, not market facts.

Run the check to see your weakest proof.

Values persist locally.

Correction: fast building is not product-market fit, and a large tooling-market claim does not predict your first customer. A first wallet still needs a specific buyer, a painful problem, a reachable person, and a concrete ask.

Entered evidence scores expose a weakest link

Read the explanation

The source asks for buyer, problem, prototype, reach and willingness to pay scores from zero to five. Its saved defaults four, four, three, two and one add to fourteen of twenty five possible points. Bars share eighteen pixels per point, comparing fourteen with the maximum twenty five. These are entered assumptions, not observed customers, validated market facts or a prediction of revenue. Among default scores four, four, three, two and one, willingness to pay is the minimum at one. If that score becomes zero, the total drops from fourteen to thirteen and it stays the weakest link. Bars share eighty pixels per point and compare prototype three with willingness to pay one. This source chooses the first minimum in input order when scores tie. The minimum describes these entries, not independently established evidence quality. Raising the default willingness to pay score from one to two changes the sum from fourteen to fifteen. Bars share twenty eight pixels per point. The source uses a less than fifteen condition, so fourteen requests more proof and fifteen calls the scenario a testable starting point. This category is not product market fit or a guaranteed first sale. Export reruns the check and invalid out of range scores block it; Reset reloads defaults after clearing the saved inputs.

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