Effective date: July 8, 2026
CalculusOne is an educational app designed to help students learn and practice Calculus I concepts. This Privacy Policy explains what information the app collects, how it is used, and what choices you have.
CalculusOne is offered as a paid download on the Apple App Store. The purchase is handled by Apple.
CalculusOne does not require an account, does not collect personal information, does not collect payment information, does not use advertising, and does not track you across apps or websites.
The app stores your learning progress locally on your device so that features such as completed lessons, bookmarks, flashcard progress, scores, streaks, and practice problems marked for redo can continue to work after you close the app.
CalculusOne stores the following learning information on your device:
completed lessons
lesson view counts
bookmarks
flashcard confidence
game scores
practice test and exam results
study streaks
practice problems marked for redo
This information is stored locally using Apple system storage on your device. It is not sent to us.
CalculusOne does not ask you to create an account and does not collect your name, email address, phone number, precise location, contacts, photos, camera data, health data, or payment information.
CalculusOne is sold as a one-time paid download through the Apple App Store.
Payments, billing, taxes, receipts, refund requests, and purchase history are processed by Apple under Apple's App Store systems and policies. We do not receive your credit card number, Apple ID password, full billing details, or other payment credentials.
CalculusOne does not currently offer subscriptions, in-app purchases, paid add-ons, or third-party payment processing.
CalculusOne does not use third-party analytics, advertising SDKs, or tracking technologies.
CalculusOne does not track you across apps or websites owned by other companies.
The learning progress stored on your device is used only to provide app features, including:
saving your progress
showing completed lessons
keeping flashcard and practice status
tracking scores and streaks
letting you redo problems you marked as failed
We do not sell, rent, or share your personal information. The app does not transmit your local learning progress to us or to third parties.
Your learning progress remains on your device until you delete it, reset progress inside the app if that option is available, or uninstall the app.
You can delete app data by deleting the app from your device. Depending on your device settings, Apple may also include app data in device backups.
CalculusOne is an educational app. It does not knowingly collect personal information from children. If you believe personal information has been provided to us by mistake, contact us so we can help address the issue.
We may update this Privacy Policy if the app changes. For example, this policy would need to be updated if CalculusOne later adds accounts, cloud sync, analytics, advertising, subscriptions, in-app purchases, or other features that change how information is handled. If we make material changes, we will update the effective date above.
For privacy questions, contact:
kevincaissieuni@gmail.com