Privacy

Short version: fitting runs in your browser and your data stays there. A few optional features (ChEMBL comparison, AI-interpret, cloud save) use the network only when you choose to use them.

Your measurement data stays in your browser

The DoseFit fitter is a single page of code that runs entirely on your own device. When you paste (dose, response) data and press fit, the calculation — the 4PL fit, the covariance confidence intervals, the chart, the CoA, the PNG/SVG export — all happens locally in your browser. The data you paste and fit is never uploaded on its own. Closing the tab clears it. A few optional features do use the network — each only when you choose it, described next.

The optional features that use the network

Three features reach the network, and only when you choose to use them:

  • Compare to literature (ChEMBL). Sends only a target identifier (e.g. CHEMBL218) and a measure type (IC50/EC50/Ki) to the public EBI ChEMBL database. None of your own data is included.
  • Interpret with AI (opt-in, beta). If you run it, DoseFit sends a summary of your fit (the fitted numbers) to Anthropic's API — with your own key, directly from your browser, never through us. It's off unless you use it, and the card says so.
  • Cloud save (Pro, opt-in). If you sign in and save an analysis, the data you save is stored in your account on DoseFit's server — that's the point of saving. Sign in to nothing, and nothing is stored.

If you only fit curves, the fitter sends none of your data anywhere.

No accounts, no tracking cookies

The fitter has no login and sets no cookies. We use no advertising trackers, no fingerprinting, and no cross-site profiling — we never build a profile of you. To see roughly how many people visit, we use Cloudflare Web Analytics: a privacy-first, cookieless tool that records only aggregate counts (page, referrer, country, browser), with no cookies and no personal data, and cannot identify you. (As with any website, the hosting server also keeps standard access logs such as IP address and page requested — ordinary web hosting, not DoseFit collecting your science.)

Accounts & paid tiers

Pro (early access) and the forthcoming Compliance tier are account-based and, by design, store the analyses you choose to save — that is the point of a system of record — and come with their own clear data terms before you sign up. Nothing is stored unless you sign in and save it yourself.

Questions

Email hello@dosefit.co and we'll answer plainly.

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