Arch Study

Privacy Policy

Last updated: October 8, 2026

iPhone app

Your study progress (lessons marked as learned, flashcards you know, starred patterns, quiz scores and your Simple/Detailed preference) is saved only on your iPhone. It never leaves your device and is deleted when you delete the app. You can clear it any time in Settings › Reset study progress.

Website and web app

The web app saves the same study progress in your browser's local storage on your own device. It is not sent to us. Clearing your browser's site data removes it. This site is hosted by Cloudflare, which processes standard technical information such as IP addresses to deliver and protect the site, as described in the Cloudflare Privacy Policy. We do not use cookies, analytics or tracking on this site.

Purchases

Subscriptions in the iPhone app are processed entirely by Apple through the App Store. We never see your name, email address or payment details. Apple's handling of your data is described in the Apple Privacy Policy.

Third parties

Neither the app nor the website includes third-party analytics, advertising or tracking software.

Children

We do not knowingly collect information from anyone, including children.

Changes

If a future version adds optional features such as accounts or sync across devices, this policy will be updated before that version is released.

Contact

Questions about privacy: srireal2021@gmail.com