Privacy
Privacy
What this site and its apps collect, why, who else sees it and how long it is kept. The short version is that your revision stays on your own device, and the account that can carry it between devices is optional.
Who is responsible
InkPhysics and InkMaths, and the Android app for each, are run by Ink Learning Ltd, a company registered in England and Wales under number 17382113, whose registered office is at 71-75 Shelton Street, Covent Garden, London WC2H 9JQ. It is the controller for the personal data described here. This notice covers the physics and maths libraries and the Android app for each. The biology library at the same address keeps progress in your browser in the same way but offers no account and no sync, so it has a notice of its own. There is also one notice for the whole address, which says which library does what. For anything about this one, including a request to exercise any of the rights below, write to support@inkphysics.co.uk.
What stays on your device
Your ratings on the revision checklist, the boxes your flashcards sit in, how far through the day you are and what you have scored on questions are all held in your own browser's local storage, or on your phone in the apps. None of it is uploaded unless you choose to sign in to the optional account described below and sync it. Without an account, clearing your browser data or uninstalling the app erases it, no copy exists anywhere else, and none of it is personal data we hold.
Physics, maths and biology are served from one address, and what each keeps in your browser stays separate: the storage keys are per-library, so nothing you have read or rated in one is visible to another. Sharing an address changed where the pages live and nothing about what is stored or who sees it.
What we do collect
If you use the site without the optional account, we collect two things, neither of which identifies you to us by name.
Page counts. The site is hosted on Cloudflare Pages and served with Cloudflare Web Analytics, which records page views and loading-speed measurements so we can see which pages are used and which are slow. It sets no cookie, uses no device fingerprint and does not follow you between websites. It is a count of pages, not a profile of a person.
Server logs. Cloudflare keeps short-lived logs of requests, including IP addresses, as part of delivering the site and protecting it from abuse. An IP address can in some circumstances identify a person, so we treat these as personal data even though we never look anyone up in them.
Unless you choose to sign in (see the optional account section below, the one place an email address enters the picture), we ask for no name, no email address, no age and no payment details, and the one thing you can fill in, the optional note on a mistake report described below, is anonymous and asks for none of them.
Why, and on what legal basis
Both are processed under our legitimate interests: knowing whether the material reaches students, and keeping the site fast, available and not being abused. We have weighed that against your interests, which is straightforward here because neither purpose needs to know who you are and neither is used to profile or target anyone. If you would rather not be counted, any browser setting or extension that blocks analytics scripts stops it, and everything here works exactly the same without it.
Who else sees it
Cloudflare, our hosting and analytics provider, processes it on our behalf under its own terms and describes what it collects in its Web Analytics documentation. Nobody else sees the hosting and analytics data. If you sign in, Google handles the sign-in itself, as the optional account section below sets out. We do not sell anything to anyone, and we share nothing for advertising. If a store distributes one of the apps, that store keeps its own record of the installation under its own policy rather than this one.
Cloudflare is a global provider, so this processing may take place outside the United Kingdom, under the transfer safeguards set out in its own terms.
How long it is kept
Unless you sign in, nothing about your revision is kept by us at all, so there is no retention period to state for it: it never leaves your device. What an account holds is kept while that account exists and is erased when you delete it, which is one button on the account page. The analytics counts are page totals rather than records of a person and are kept while they are useful for seeing what the site is being used for. The server logs are short-lived and held by Cloudflare under its own retention policy, kept no longer than delivering and protecting the site requires, and are not copied to us.
Your rights
Under UK data protection law you have the rights of access, rectification, erasure, restriction, portability and objection over personal data held about you, and the right to object to processing carried out on the basis of legitimate interests. Without an account there is very little here to exercise them against: no contact details and no user records, and everything about your revision sits on your own device where only you can reach it. With an account, access and erasure are self-service: the account page shows what is held and deletes it on demand. The other holding is the short-lived server logs described above. Write to support@inkphysics.co.uk and we will answer within one month.
If you are not satisfied with how this site handles any of it, you can complain to the Information Commissioner's Office at ico.org.uk, or by telephone on 0303 123 1113. We would rather you told us first, but you do not have to.
Reporting a mistake
Every page, and both apps, can send us a report that something is wrong: a control on each section, figure, worked example, question and flashcard, and one for the page as a whole. A report carries the category you pick, the note if you typed one, which element you flagged, the page it is on, a short excerpt of the flagged text and the build version of the site or app, and nothing else. It does not carry your name, your email address or any link to your account, even if you are signed in: a report carries nothing that ties it to a person.
An optional email address is the one exception, and it exists because a reporter asked for it: somebody who has found a real error often wants to know what came of it. The field is blank unless you fill it in, it is stored on the report itself, and it is used to reply to you about that report and for nothing else. It is never added to a mailing list, never linked to an account, and never used to identify you across reports. Leave it empty and the report stays anonymous exactly as before. The lawful basis for holding it is your consent, given by typing it, and asking us to erase it is a request we can act on because the address is the one thing on a report that can find it again.
So that the form cannot be flooded by robots, a report from the sites runs a Cloudflare Turnstile check before it sends, under Cloudflare's own privacy policy, and the sending connection's IP address is used transiently to limit how many reports one address can send in a day. That IP address is never stored by us: the rate limit keeps only a salted, hashed counter that cannot be turned back into an address, and the counters themselves are swept daily.
The note is free text, so please do not type personal details into it: no names and no contact details. Reports get no reply, so contact details would do nothing but sit in a list. A report is kept until it has been read and acted on, and is deleted when it is no longer needed.
The apps
InkPhysics and InkMaths for Android keep everything on the phone: what you have read, how you rated it, which cards are due and what you have scored. The data remains on the device unless you sign in and enable sync. Either app sends this site two things at most: a request for the library itself when it checks for new topics (the same request your browser makes when you read a page) and, only if you choose to send one, a mistake report as described above.
The apps ask for two permissions and use them for one thing each: notifications, to show the daily reminder if you switch it on, and alarms, to show it at the time you chose rather than whenever the phone gets round to it. Neither is used for anything else.
The optional account
You can sign in with a Google account on the account page, and everything on both sites works exactly the same without one. An account exists to carry your revision between devices: your reading, checklist ratings, flashcard boxes and question scores, together with settings you choose to set, which are your exam year, exam board and subjects.
When you sign in, Google tells us your email address and a stable identifier, under Google's own privacy policy; we see no password and ask for nothing else. What we hold is that identity, the settings above and the synced progress, stored with Cloudflare and kept only while the account exists. Signing out removes a device's access; deleting the account, one button on the same page, erases the account and everything synced with it immediately.
Cookies
None. The analytics sets no cookie, and what the site remembers about your revision it keeps in local storage on your own device rather than in anything sent back to a server.
Video and other links
Some topics link to a video on the InkPhysics YouTube channel. The link opens YouTube, where Google's own privacy policy applies. Nothing is embedded in the pages, so nothing from YouTube loads or sets a cookie unless you follow the link. The same goes for links out to the exam boards.
Children
This is a revision site for A-level students, so most readers are sixteen to eighteen, and younger readers are welcome. Nothing here requires an account or asks for a name or an age; the optional account asks only for a Google sign-in, and is as optional for younger readers as for anyone else. What the site holds is set out above: page counts that are not tied to a person, and short-lived server logs kept by Cloudflare while it serves the site.
Changes to this notice
If what the site collects ever changes, this page is updated first and carries the date of the change. The optional account above arrived exactly that way: described here in full before it was announced anywhere. Anything new that involved holding personal data would get the same treatment, and would stay optional: the library itself is readable without any of it.
Getting in touch
Anything about this notice, and any request under the rights above, goes to support@inkphysics.co.uk. Corrections to the physics are welcome there too, or as a comment on the YouTube channel.