Privacy policy

Last updated: 13 June 2026

NumericalReasoningPractice.com (a Cognivy product) helps you practise numerical reasoning tests. This policy explains what data we collect, why, how long we keep it, and the choices you have. The short version: we collect the minimum needed to run the site, our own practice analytics are pseudonymous, any third-party analytics (Google Analytics, Microsoft Clarity) run only if you accept cookies, we never sell your data, and we show no ads.

What we collect

Account data. If you create an account, we store your email address and an account id, handled by Supabase (our authentication and database provider). If you sign in with Google, Google shares your email address with us; we receive no other profile data. You can use the free test and browse the whole site without an account.

Practice results. Your diagnostic and practice results (scores, per-topic accuracy, streaks) are stored against your account so your dashboard works. If you take the free test without an account, the result is held only in your own browser until you choose to sign up.

Answer analytics. Each answered question is recorded as an event (which question, which option, correct or not, time taken) so we can calibrate question difficulty from real solve data. These events carry no name or email — they are keyed by a one-way hash of your account id, or for visitors a random session id that is only stored as a cookie with your consent (see cookies below).

Site analytics (with your consent). If you accept analytics cookies, we use Google Analytics (provided by Google) and Microsoft Clarity (provided by Microsoft) to understand how the site is used — which pages are visited, how people navigate, and where they get stuck — so we can improve it. Clarity also captures anonymised interaction recordings (clicks, scrolls and mouse movement), with on-page text masked by default. These tools set their own cookies and process this data on our behalf. They do not run, and set no cookies, unless you accept in the cookie banner, and we use them only for analytics — never for advertising.

Payments. Purchases are processed by Lemon Squeezy as the merchant of record. Your card and billing details go to Lemon Squeezy, not to us; we receive the order confirmation and the account id needed to unlock your purchase.

Hosting logs. The site runs on Vercel, which keeps standard server logs (including IP addresses) for security and operations.

Cookies and local storage

Essential cookies — these make the site work and need no consent:

• Supabase auth cookies — keep you signed in.
• nr_hub_taster — enforces the free daily Math Hub limit; expires after 24 hours.
• nr_consent — remembers your cookie choice for 12 months.

Optional cookies — set only if you accept in the cookie banner:

• nr_sid — a random id that links your practice answers across visits while you are not signed in, so difficulty calibration can use them; expires after 12 months.
• Google Analytics (cookies named _ga and _ga_*) — measures site usage such as pages, sessions and referrers; these last up to two years.
• Microsoft Clarity (cookies named _clck and _clsk) — links anonymised interaction recordings to a session so heatmaps and replays work; these last up to one year.

If you decline — or later withdraw using “Cookie settings” in the footer — none of these optional cookies are set, Google Analytics and Microsoft Clarity do not load, and we remove any of their cookies already present. We also use your browser’s local storage to hold your free-test result on your device until you sign up; it never leaves your browser unless you create an account. We show no ads and use no advertising trackers.

Why we use this data

• To provide the service you signed up for — accounts, results, purchases (contract).
• To calibrate question difficulty and improve the question bank, using pseudonymous answer events (legitimate interest, with the cookie itself consent-based).
• To understand and improve how the site is used, via Google Analytics and Microsoft Clarity (consent).
• To keep the site secure and operational (legitimate interest).

Who we share it with

Only the processors needed to run the site: Supabase (database and authentication), Vercel (hosting), Lemon Squeezy (payments, as merchant of record), Google (Google sign-in if you choose it, and Google Analytics if you accept analytics cookies) and Microsoft (Clarity analytics, if you accept analytics cookies). We do not sell or rent personal data, and we share nothing with advertisers.

How long we keep it

Account data and results are kept while your account exists and deleted when you ask us to delete it. Pseudonymous answer events are kept for difficulty calibration; once your account is deleted they can no longer be connected to you. Lemon Squeezy retains order records as required by tax law.

Your rights

Under UK and EU data protection law you can ask for a copy of your data, ask us to correct it, or ask us to delete your account and everything tied to it. Email us and we will action it — no forms, no friction. You can change or withdraw your cookie consent at any time using the “Cookie settings” link in the site footer (declining there also removes the analytics cookies); we ask again 12 months after your last choice. If you are unhappy with how we handle your data you can complain to your local supervisory authority (the ICO in the UK).

Contact

Email hello@cognivy.io for anything in this policy, including access and deletion requests.

Changes

If we change what we collect or who we share it with, we will update this page and the date at the top before the change takes effect.