Privacy policy
Effective 13 November 2026
PI Browser is a personal, non-commercial project. This policy covers the PI Browser app for iPhone and iPad and the website at portlandiator.github.io/PI_browser.
What we collect
No personal information. There are no accounts, advertising or tracking, and we do not collect, receive, sell or share personal information. The only thing measured is how many visitors the website’s four main pages have each week, counted anonymously as described below. The app measures nothing.
What stays on your device
The app keeps your bookmarks, the last 100 pages you visited, and your reading preferences (such as text size and language) on your device. The website keeps your reading preferences in your browser’s storage, together with a note of which main pages it has been counted on this week and the latest visitor totals. None of this is sent to us. It is removed when you delete the app or clear the website’s data in your browser, though your device’s own backups may include it.
When the app goes online
The complete collection is installed with the app and works without a connection. The app only goes online when you ask it to:
- Check website release, on the Collection screen, downloads a small file from the website.
- External references, such as bibliography or comparison links, open in Safari inside the app.
As with any web request, those sites see technical details such as your IP address. They handle them under their own privacy policies.
How the website counts visitors
The Catalog, Volumes, Subjects and Study guides pages each show how many visitors they have had this week. When you do something on one of them (move the pointer, touch the screen or press a key), the page reads the week’s totals from GitHub, which hosts the website. If you are still doing something there ten seconds later, the page also asks GitHub for a small file, the first time in a week. GitHub keeps a total of how often each file has been requested, and that total is the number shown. Waiting in this way keeps automated programs out of the count; what you did, and when, is not recorded or sent.
The request names only the page and the week. It carries no cookies, no name or other identifier, nothing about what you read, and no record of the page you came from. Your browser notes in its own storage that it has been counted this week, so that it is not counted twice; the note is the same for every visitor and is never sent anywhere. The totals are public: they appear at the foot of those pages, as a graph of the weekly totals, and in the project’s repository on GitHub. Opening the graph counts nothing: it only reads the totals from GitHub, again without cookies or any identifier.
The app does not take part in this count.
Website hosting
The website and the volume PDFs are hosted on GitHub Pages. GitHub may log visits for security and operational purposes, as described in the GitHub Privacy Statement; this includes the request that counts a visit. The website sets no cookies and uses no analytics service.
Children
We collect no personal information from anyone, including children.
Changes
Any change to this policy will be posted on this page with a new effective date.