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Keep rigorous evidence free.

The calculators, templates, and training on this site are free because people like you make them so. Every contribution — money, membership, or code — widens who gets access to good methods.

Three ways to help

Pick the one that fits you.

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A one-time or recurring gift directly subsidises free tools and methods training for students and researchers in low-resource settings.

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Become a member — from a free Learner account to a Practitioner plan that unlocks the full template and code library.

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Improve a template, fix a formula, add a code example. The whole site and library are developed in the open.

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Institutional or in-kind support? We also welcome sponsored tools, workshop funding, and data partnerships — get in touch and we'll find the right fit.

Where donations go

Small gifts, visible results.

$10 keeps the calculators ad-free for a month
$29 sponsors a student's Practitioner membership
$100 funds a new open template, reviewed and released
$500 underwrites a live methods workshop for a partner university

"Open tools are how good methods reach the places that need them most."

— Dr. Tariku Jibat Beyene

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Every good decision starts with good evidence.

Join the community, make a gift, or send an improvement — all three keep the evidence open.

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