Keyku Privacy Policy

Effective Date: April 27, 2025

Introduction

Yu Te Lu ("we", "our", or "developer") operates the Keyku mobile application (hereinafter referred to as the "Service").

This page informs you about our policies regarding the collection, use, and disclosure of personal data when you use our Service and the choices you have associated with that data. We value your privacy and are committed to protecting your personal information.

Definitions

Service

Service refers to the Keyku mobile application operated by Yu Te Lu.

Personal Data

Personal Data refers to any information that can be used to identify a living individual, either on its own or in combination with other information that we possess or might obtain.

Usage Data

Usage Data is data automatically collected through the use of the Service or from the Service infrastructure itself (for example, the duration of a page visit).

Data Controller

Data Controller means the natural or legal person who (either alone or jointly or in common with other persons) determines the purposes for which and the manner in which any personal information is, or is to be, processed.

For the purpose of this Privacy Policy, we are the Data Controller of your Personal Data.

Data Processor (or Service Provider)

Data Processor (or Service Provider) means any natural or legal person who processes the data on behalf of the Data Controller. We may use the services of various Service Providers in order to process your data more effectively.

Data Subject (or User)

Data Subject is any living individual who is using our Service and is the subject of Personal Data.

Data Collection and Use

Personal Data Collection

The Keyku application does not directly collect the data you input. All your input data is stored locally on your device using secure encryption methods and is not uploaded to any servers or shared with third parties.

However, we do collect the following data through our payment management service RevenueCat to view and track your in-app purchases and subscription status:

• Purchase-related information (such as subscription status, transaction IDs)

• Basic device information (such as operating system version, application version)

• Apple account-related transaction information

Please note that RevenueCat can only view subscription data; to cancel or modify subscriptions, you need to do so directly through the Apple system.

These data are collected and processed by RevenueCat on our behalf, and we as developers can access this information to view your purchase and subscription status.

Encryption and Security

All sensitive data you input is encrypted when stored locally on your device. We neither "know" nor store any of your password information. As no storage or transmission method can ever be 100% secure, Keyku cannot guarantee absolute security, but we have taken all reasonable measures to protect your data.

Payment Processing

We may offer paid products and/or services within the Service. In such cases, we use Apple Store In-App Payments for payment processing and RevenueCat as a tool to view and track these payments.

We do not store or collect your payment card details. This information is provided directly to Apple, whose use of your personal information is governed by their privacy policy. Apple's payment processing systems adhere to the PCI-DSS standards managed by the PCI Security Standards Council, which is a joint effort of brands like Visa, MasterCard, American Express, and Discover. PCI-DSS requirements help ensure the secure handling of payment information.

The payment-related services we use are:

• RevenueCat: As a viewing tool that helps us track subscriptions and in-app purchases made through the Apple App Store. RevenueCat may collect certain data, such as purchase-related information and basic device information to provide its services. Please note that RevenueCat can only view subscription data; canceling or modifying subscriptions must be done directly through the Apple system.

• Apple Store In-App Payments: Processes the actual payment transactions through the Apple App Store.

You can view their privacy policies at:

• Apple's Privacy Policy: https://www.apple.com/legal/privacy/en-ww/

Data Retention

Regarding the data stored on your device, this data remains only on your device and will remain there as long as you choose to keep it.

For payment and subscription-related data collected through RevenueCat, we retain this data while your subscription is active to view and track your subscription status. If you cancel your subscription, the related payment data will be deleted or anonymized within a reasonable time. Please note that subscription cancellation must be done directly through the Apple system.

Data Security

The security of your data is important to us, but remember that no method of transmission over the Internet or method of electronic storage is 100% secure. While we strive to use commercially acceptable means to protect your personal data, we cannot guarantee its absolute security.

Children's Privacy

Our Service does not address anyone under the age of 13 ("Children"). We do not knowingly collect personally identifiable information from anyone under the age of 13. If you are a parent or guardian and you are aware that your child has provided us with Personal Data, please contact us. If we become aware that we have collected Personal Data from children without verification of parental consent, we take steps to remove that information from our servers.

Your Data Protection Rights

Rights of European Economic Area (EEA) Residents (GDPR)

If you are a resident of the European Economic Area (EEA), you have certain data protection rights. Keyku aims to take reasonable steps to allow you to correct, amend, delete, or limit the use of your Personal Data.

In certain circumstances, you have the following data protection rights:

• The right to access, update, or delete the information we hold about you.

• The right of rectification. You have the right to have your information rectified if that information is inaccurate or incomplete.

• The right to object. You have the right to object to our processing of your Personal Data.

• The right of restriction. You have the right to request that we restrict the processing of your personal information.

• The right to data portability. You have the right to be provided with a copy of the information we have on you in a structured, machine-readable, and commonly used format.

• The right to withdraw consent. You also have the right to withdraw your consent at any time where Keyku relied on your consent to process your personal information.

Please note that we may ask you to verify your identity before responding to such requests.

You have the right to complain to a Data Protection Authority about our collection and use of your Personal Data. For more information, please contact your local data protection authority in the European Economic Area (EEA).

California Residents' Rights (CCPA/CPRA)

The California Consumer Privacy Act (CCPA) and the California Privacy Rights Act (CPRA) provide California residents with specific privacy rights. These rights include:

• The right to know what personal information is collected

• The right to delete personal information

• The right to opt-out of the sale/sharing of personal information

• The right to non-discrimination for exercising privacy rights

While the payment-related information we collect through RevenueCat constitutes personal data, its collection is limited to necessary transaction information for viewing and tracking your subscription status. Please note that subscription cancellation must be done directly through the Apple system. We respect your privacy rights and comply with these regulations where applicable. If you are a California resident and wish to exercise your rights, please contact us at derderappledev@gmail.com.

Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page.

You are advised to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page.

Disclaimer / Limitation of Liability

The user acknowledges that the software may not be free from defects and may not satisfy all needs. Installation and usage are at the user's own risk.

The software is provided "as is" without any express or implied warranty. In no event will the author be held liable for any damages arising from the use of this software.

Contact Us

If you have any questions about this Privacy Policy, please contact us:

Email: derderappledev@gmail.com