What this site knows about you
Almost nothing, and this page says exactly what. No accounts, no sign-up, no email capture, no ads. Your study progress lives on your own device and is never uploaded. What leaves your browser is an anonymous count of which pages get opened, and an anonymous note when one of ten features is used.
The short version. StatsCapybara counts page views anonymously with Google Analytics, notes anonymously when a feature such as search or the quiz is used, sets no analytics cookie, and stores everything about you (progress, quiz scores, flashcards, theme) in your own browser. There is nothing to log into and nothing to delete from a server, because there is no account.
What is collected
Two things: an anonymous page view when you open a page, and an anonymous note when one of ten features is used. That is the whole list.
It arrives through Google Analytics 4, and the tag on every page is configured with Consent Mode set to deny storage by default. In practice that means Google sets no _ga cookie and nothing persists in your browser to recognize you on a later visit. Each view is counted; you are not followed from one to the next. Advertising storage and personalization are denied outright.
What the counts are for is unglamorous. They tell me which lessons people actually read, which tools get opened, and which pages are broken enough that everyone leaves. That decides what gets rewritten next. Nobody is profiled and nothing is sold, because there is no advertising business here to sell it to.
The ten feature notes exist for the same reason. A page view cannot tell me whether anyone has ever finished a mock exam, printed a lesson, or embedded one in a slide, so features I spent weeks on could serve nobody at all while I kept maintaining them. Each note carries the event name and, at most, a coarse label:
- The search box was opened. Never what you typed into it.
- A practice quiz or a mock exam was finished, with its course scope, its length, and a band of 0 to 49, 50 to 79, or 80 to 100 percent. Never your actual score.
- A worked solution was opened on the practice problems page, with the course it belongs to.
- A visualization was downloaded as a PNG, or a page was printed, or a lesson was loaded in embed mode. Each says only which kind of page it happened on.
- The "Spotted a mistake" footer link was clicked, the site was installed as an app, or a course certificate was downloaded. The certificate note carries the course. Never the name you typed on it.
There is no identifier attached to any of this beyond what the page view already has, which is nothing that persists. Two notes from the same person in the same minute cannot be told apart from two notes by two people.
Analytics does see what any web server sees: the page address, the referring page, a rough country-level location derived from your IP address (Google does not report the address itself to me), and the kind of browser and device you use. I see those only as totals in a dashboard, never row by row for a person.
What never leaves your browser
The features that feel personal are all client-side. They use localStorage, a small store that belongs to your browser on this one device, and nothing in it is transmitted anywhere:
| Key | What it holds |
|---|---|
sc-progress | Which lessons you have visited or marked complete, with a date. |
sc-last | The last lesson you opened, so the homepage can offer to resume it. |
sc-checks | Your best score on each lesson's three check questions. |
sc-exam | Your best mock-exam result for each quiz scope. |
sc-cards | Which flashcard box each glossary term sits in, and when it is next due. |
sc-name | The name you typed on a course certificate, so you need not retype it. |
theme | Light or dark. |
Because this lives on the device, it is genuinely device-local: finish six lessons on a laptop and your phone will show none of it. That is a real limitation, and it is the price of not asking you to make an account. It also means your progress is yours to destroy. Clearing site data for statscapybara.com in your browser settings wipes every key above, immediately and permanently, and the tools offer their own reset buttons for a lighter version of the same thing.
The pages that let you paste your own numbers, like the descriptives and correlation calculators, compute in your browser. Your data is never uploaded, not even briefly. You can watch this yourself by pasting a column with the network disconnected; the answers still appear.
What the site contacts
Two outside services, both narrow:
- Google Analytics (
googletagmanager.com). Receives the anonymous page views and feature notes described above. It can see your IP address in transit, as any server you connect to can, and uses it to work out an approximate country before discarding it. - Ko-fi (
storage.ko-fi.com). The support button in the footer is an image loaded from Ko-fi's server, so Ko-fi sees the request for that image and the IP address it came from. Clicking through to donate takes you to Ko-fi, where their privacy policy applies and mine stops.
That is the complete list. No fonts, scripts, stylesheets, or trackers load from anywhere else: everything else on this site is served from statscapybara.com, which is why the site keeps working after you go offline.
Things that will not happen
- No ads, ever. Not a banner, not a sponsored lesson, not an affiliate link dressed as a recommendation.
- No accounts. Nothing to sign up for, so there is no password of yours to lose and no mailing list to escape.
- No selling or sharing. There is no data of yours to sell, and there will not be.
- No dark patterns. No popups begging for an email before you can read a lesson.
The site is free and stays free. If you want to support it, the Ko-fi button in the footer is the only ask, and ignoring it costs you nothing.
Children and classrooms
The site collects no personal information from anyone, which includes students under 13. It is used in university courses and can be assigned without a data-processing agreement, because there is no student data to process. Instructors may find the instructor page useful on that point.
Questions or corrections
Write to me. The Spotted a mistake? Tell me link at the bottom of every page opens an email with that page's address already filled in, and it is the right route for a privacy question too. If something on this page is wrong or has gone stale, I would rather hear it than have it sit here.
Last updated 21 July 2026. StatsCapybara is made by Hakan Karsilar and hosted on GitHub Pages, which serves the files and keeps its own server logs.