Short version
Pencilmark collects nothing. No accounts. No tracking. No analytics. Nothing leaves your iPad.
Where your drawings live
When you draw on a webpage, the strokes are saved to a local database (IndexedDB) inside Safari, scoped to the Pencilmark extension. They stay on your iPad. They are never uploaded, never synced to a server, never read by us.
If you delete the Pencilmark app, or use the "Clear all drawings" button in the About tab, the database is removed and your strokes are gone for good. There is no backup, because there is no server.
What Safari knows
Apple's standard Safari telemetry applies. Pencilmark itself does not see, request, or transmit any usage data. The extension reads the page you are on only to render strokes over it; the page content is never copied or sent anywhere.
Contact
Questions, concerns, or curiosity: support@pokkle.com.