Privacy Policy

Last Updated: November 2025

This Privacy Policy describes how Professor Klaus (“the Product”) handles and protects user information.

The Product strictly complies with the Google API Services User Data Policy, including its Limited Use requirements.

1. Product Overview

Professor Klaus is a lightweight productivity tool designed to help users manage their learning or personal schedules more efficiently.

The Product integrates with Google Calendar to read and create events, providing intelligent reminders based on users’ schedules.

Specifically, the Product uses:

  • Google Calendar API (createCalendarEvent) — to read and create calendar events for scheduling and reminders.All reminders and notifications are handled directly through Google Calendar itself.

2. Data Handling Principles

Professor Klaus is designed with the principles of data minimization and local processing, ensuring maximum user privacy and data security.

  1. No personal data collection, storage, or transmission.The Product does not download, store, or upload any user information, documents, or calendar data.
  2. All processing is performed locally on the user’s device.The creation and management of events occur entirely on the user’s computer, without using any external or third-party servers.
  3. All reminders rely solely on Google Calendar’s internal notification system.The Product only creates or reads events through the Google Calendar API; reminders and notifications are managed natively by Google Calendar.
  4. No access to other user data.The Product does not access or modify any other Google data beyond what the user explicitly authorizes.

3. Authorization Scope

Upon explicit user consent, the Product requests the following Google OAuth scope:

This permission is used exclusively to provide the core functionality described above and for no other purpose.

4. Data Storage and Security

  1. The Product does not store any user data on developer or third-party servers.
  2. All calendar data is securely stored within Google’s infrastructure under the user’s own account.
  3. All communications with Google APIs are transmitted securely via HTTPS encryption to ensure data confidentiality and integrity.
  4. The Product does not include any third-party trackers, ad networks, or analytics tools.

5. User Control

Users retain full control over their data and permissions. They may:

  • Revoke access to the Product at any time through Google Account Permissions;
  • Delete any events created by the Product directly within Google Calendar;
  • Stop using the Product at any time without affecting any existing Google Calendar data.

Once authorization is revoked, the Product will no longer have access to any user data.

6. Children’s Privacy

The Product is not intended for use by children under the age of 13, and it does not knowingly collect or process any data from minors.

7. Updates to This Policy

This Privacy Policy may be updated periodically. The latest version will always be available on this page, with the “Last Updated” date clearly indicated.

Any significant changes will be communicated to users through appropriate means.

8. Contact Information

For any questions or concerns about this Privacy Policy or data practices, please contact the development team:

Developer Name: Drop in AI Team

Email: chunweichen0328@gmail.com

Website: https://dropinaistore.com

9. Compliance Statement

Professor Klaus fully complies with the Google API Services User Data Policy, including the Limited Use requirements:

  • No personal data is collected, stored, or transferred.
  • No access is made to any non-authorized Google content.
  • All processing and logic occur locally on the user’s device.
  • All reminders and event data remain securely stored within the user’s own Google Calendar account.
  • The Product uses Google API data exclusively for its intended purpose — creating and managing events with explicit user consent.