Cookie Policy
Last updated: 6 November 2026
This policy lists the cookies and similar technologies used on flash-cardz.com and in the FlashCardz web app (app.flash-cardz.com): what each is for, who sets it and how long it lasts. It goes with our Privacy Policy, which explains how we use personal data in general. This is version 2026-11-07; when it changes in a way that matters to you, the cookie banner asks you again.
The short version
- The cookies FlashCardz needs in order to work are always on. Everything else is off until you agree.
- Analytics cookies are ours: they let us recognise this browser on a later visit, so we know which visit led to a sign-up. What they measure stays with FlashCardz.
- Ad measurement cookies are Meta's (Facebook, Instagram): with them, Meta learns that you came from one of our ads and signed up or subscribed.
- “Reject all” is as easy as “Accept all”, and “Cookie settings”, at the foot of every page of our website and in the app's Settings, changes your answer at any time.
1. What cookies are
A cookie is a small file a website stores in your browser and reads again later. Similar technologies work the same way: your browser's local storage, and pixels, small pieces of code that tell a service that a page was opened. This policy calls them all cookies. Most of ours are set by us (first-party); a pixel also lets another company, here Meta, read or set its own.
2. Necessary: always on
These are needed for what you asked for: signing in, remembering your choices, studying offline. The law doesn't require consent for them, and blocking them in your browser stops parts of FlashCardz working.
| Name | What for | Set by | Lasts |
|---|---|---|---|
| fc_consent | Your answer to the cookie banner: which kinds you allowed, how and when you answered, and the version of this policy | FlashCardz | 12 months |
| fc_lang | The language you picked on the website | FlashCardz | 12 months |
| flashcardz_gate | Opening a test version of the app, for testers who were given its password | FlashCardz | 90 days |
| Sign-in session (browser storage) | Keeping you signed in to the web app | FlashCardz, through Supabase | Until you sign out |
| Preferences and offline copies (browser storage) | Your theme and language, a copy of your day's cards and the answers waiting to be sent, so you can study with no connection, and what you were in the middle of, such as a sign-in code on its way to your email | FlashCardz | Until you sign out or clear them; some only while the tab is open |
3. Analytics: only with your consent
These let us see how visitors find and use FlashCardz across more than one visit, so that we can improve the website and the app and learn which of our campaigns bring students who stay. They're ours: what they measure goes to FlashCardz's own servers in the EU, run for us by the providers in the Privacy Policy, and to no one else.
| Name | What for | Set by | Lasts |
|---|---|---|---|
| fc_vid | A random number for this browser, which links your visits to each other, and to your account if you sign up | FlashCardz | 13 months |
| fc_ft | Your first arrival: the campaign tags on the link, the website that sent you and the first page you saw | FlashCardz | 13 months |
4. Ad measurement: only with your consent
We advertise FlashCardz on Facebook and Instagram. With your consent, Meta's Pixel runs on our website and in the web app, and tells Meta that a page was opened, that you saw our plans, that you pressed a way into the app, that you signed up, or that you started a checkout. From our servers we also tell Meta about your sign-up, the start of a trial and a first payment (never a renewal), with the identifiers listed in the Privacy Policy, turned into one-way codes where they could name you. Meta uses this to tell us which ads worked, and may also use it, under its own policy, to improve how it delivers ads, ours included. The Pixel sends only what we tell it to: its automatic collection of what's on a page is turned off.
| Name | What for | Set by | Lasts |
|---|---|---|---|
| _fbp | Meta's number for this browser, to recognise it in ad measurement | Meta, on our domain | 90 days |
| _fbc | The click on a Meta ad that brought you, taken from the link | Meta or FlashCardz, on our domain | 90 days |
| Meta's own cookies on facebook.com | If you use Facebook or Instagram in this browser, Meta may read its own cookies when the Pixel runs | Meta | As Meta's Cookie Policy says |
For collecting these events and passing them to Meta, Meta and we are joint controllers; what Meta does with them afterwards is its responsibility, under Meta's Privacy Policy and Cookie Policy. Meta may transfer the data to the USA, under the EU–US Data Privacy Framework. In Meta's own ad preferences you can also limit how it uses activity from other websites.
5. What we count without cookies
Without your consent to analytics, our website and sign-up screens still count, for us alone, which pages are opened, which sections are reached, how far a page is read and which buttons are pressed, together with the campaign tags on the link, the website that sent you, the kind of device and your country. Nothing is stored on your device for this, each page is counted on its own, and nothing links it to you or to your next visit. We keep these figures for 13 months.
If you sign up, the campaign tags carried in the link you signed up by are kept with your account, so that we know which campaign brought it; the Privacy Policy explains why, and how to object. Vercel Web Analytics and Speed Insights count visits and measure loading speed without cookies too, and receive page addresses with everything after the path removed.
6. Your choices
- Change or withdraw your answer at any time with “Cookie settings”, at the foot of every page of our website and in the app's Settings. Withdrawing deletes our analytics cookies and Meta's cookies on our domain, and nothing more is sent from then on.
- Under “Choose”, analytics and ad measurement start switched off: nothing is switched on for you.
- Your browser's settings can block or delete cookies; blocking the necessary ones stops parts of FlashCardz working.
- Your answer holds for 12 months, and then we ask again. We keep a record of it, as proof, for 24 months.
7. Changes and new partners
If we start using a new kind of cookie, or measure our ads on another platform, such as TikTok, Google or Snapchat, we add it to this policy first, and the cookie banner asks you again before it is used. Questions about cookies: support.flashcardz@gmail.com.