FAQ

Things people ask us.

Can't find your question? Email us — a real person reads every message.

How much does it cost?

£4.99, one time, per run. There is no subscription, no account, and nothing renews. The result is a URL you can bookmark and return to forever. Subscription DNA services typically charge £100–£300 per year for similar analysis; we charge once because it covers compute, hosting, and Stripe's own fees, and means we never have to put ads or trackers on the site. You're not charged if your file fails to parse or if the matcher finds zero results — we check first, then ask for payment.

Will my DNA file be stored anywhere?

No. Your file is read into memory just long enough to find the matches, and discarded the moment your results are ready. See Privacy for the full story.

Which DNA services do you support?

23andMe (v3, v4, v5), AncestryDNA, MyHeritage, Living DNA, and the single-sample raw files from Nebula, Dante Labs, and other clinical-grade services. More formats are on the way — write to [email protected] if yours isn't listed.

Can my results be reconstructed from the URL?

No. The URL contains only the IDs of the matches that came back, plus the genotype keys needed to choose the right wording. It does not contain rsids, positions, or anything that could be reverse-engineered back into your DNA.

If you don't store anything, how can I come back to my results later?

The URL is the result. Bookmark it, email it to yourself, save it in a password manager — the page will render identically next year. We keep every prior version of the URL format around forever, so older links never break.

Should I act on a match?

Not on Crick's say-so. We're an educational tool, not a diagnostic one. If a match concerns you, please talk to a healthcare professional or a certified genetic counsellor — clinical-grade confirmation matters before any medical decision.

Why is the library only a few hundred variants?

Because we've focused on variants that are reliably present on consumer DNA chips and have been replicated by independent studies. Padding the library with thousands of underpowered single-study findings would be easy — and misleading. We'd rather be smaller and honest.

What if a match looks wrong?

Tell us. Email [email protected] with a reference to a peer-reviewed paper and we'll take a look. The library is meant to improve over time, and we publish a short note whenever we make a correction.

Is the PDF export really private?

Yes. The PDF is generated in your browser, on your machine. Your genome data never travels back to our servers during export.

Why “Crick”?

After Francis Crick, co-discoverer of the structure of DNA. The name is a nod, not an affiliation.