Privacy policy

Last updated: 5 November 2026

This policy covers the AI Engineer Path app for iPhone, iPad and Mac, and this website. Both are provided by Kwok Cheung Poon.

We do not receive your reading progress, quiz results or any other personal data. The app has no sign-in, no advertising and no analytics.

On your device

The app saves which chapters you have completed, your best quiz scores and the last chapter you opened, so you can continue where you left off. This information stays on your device, is not included in device backups, and is deleted when you delete the app.

Links

Optional links open third-party websites, including documentation, certification providers and GitHub. Those services handle information under their own privacy policies.

This website

The website sets no cookies and uses no analytics. It is served by Cloudflare, which processes technical data such as IP addresses to deliver the pages and protect the site from abuse.

Purchases

The app is bought through the App Store. Apple handles payment and shares no personal details with us. See Apple’s privacy policy.

Children

The app is a course for software engineers and is not directed at children.

Changes

If this policy changes, the new version will be posted on this page with a new date.

Contact

Questions about this policy: ai-engineer@twinkle.hk.