Last updated: January 27, 2026

Privacy Policy

Introduction

This Privacy Policy describes how I collect, use, and manage your information when you use the Hi Piano application. I'm an independent developer and take your privacy seriously.

Hi Piano is a local application that runs entirely on your device. I do not store, process, or transmit any of your personal data to external servers. Your information remains on your device at all times.

By using the Service, you agree to the collection and use of information in accordance with this Privacy Policy.

🔒 Key Privacy Points:
  • ✓ No server-side data storage
  • ✓ No user accounts created
  • ✓ All processing happens on your device
  • ✓ No personal data collection beyond analytics

Definitions

The following terms have the meanings defined below:

Application: Refers to Hi Piano, the software program provided by the Developer.
Developer: (referred to as "I", "Me", "My" or "Developer" in this Privacy Policy) refers to the individual developer of Hi Piano.
Device: Any device that can access the Service such as a smartphone, tablet, or computer.
Service: Refers to the Hi Piano Application and all related services provided.
Usage Data: Data collected automatically through Google Analytics about how you interact with the Service.
You: The individual accessing or using the Service.

Collection of Data

Local Data - On Your Device Only

Hi Piano is designed to work completely offline. All your data, preferences, and files remain stored only on your device. I have no access to any of this information.

Google Analytics

I use Google Analytics to understand how you use the Hi Piano application and to improve the user experience. This is the only external data collection that occurs. Google Analytics collects the following non-personal information:

  • Pages and features you visit or use
  • Time spent on different sections of the app
  • Device type and operating system
  • Approximate location (country/region level)
  • Browser type and language settings

How Google Analytics Works

Google Analytics uses cookies and similar technologies to track your usage. This data is processed by Google according to their own privacy policy. I do not collect personally identifiable information (PII) through Google Analytics. All data sent to Google is anonymized and aggregated.

⚠️ Important:

I do NOT collect: emails, phone numbers, names, passwords, account information, or any personal identifiers. Only anonymized usage analytics from Google Analytics.

Use of Your Data

The data collected is used for the following purposes:

To Improve the Application

I use Google Analytics data to understand which features are most popular, where users spend the most time, and how to make the app better. This helps me prioritize improvements and fixes.

To Ensure Quality Service

Analytics data helps me monitor app performance across different devices and regions, ensuring Hi Piano works well for everyone.

For Legal Compliance

If required by law or regulation, I may use anonymized data to respond to valid requests from authorities.

Data Retention

Local Data

All data stored on your device is under your complete control. You can delete any data at any time by uninstalling the app or clearing app data from your device settings.

Google Analytics Data Retention

  • Analytics Data: Google Analytics retains data according to their retention settings. By default, user activity data is retained for 14 months.
  • No Personal Data Stored: I do not store or retain any personally identifiable information. I only have access to anonymized, aggregated data through Google Analytics.

For more information about how Google Analytics handles data retention and privacy, please visit their privacy policy at https://policies.google.com/privacy.

Security of Your Data

Hi Piano processes all data on your device, which means your information is protected by your device's own security measures (device lock, encryption, etc.). Since I do not have access to your local data, there is no risk of data breach on my servers.

Google Analytics data is transmitted securely using encryption. For more details, see Google's security documentation.

Your Privacy Rights

Right to Access & Control

You have full control over all data stored on your device. You can access, modify, or delete any data at any time through your device's file manager or app settings.

Right to Opt-Out of Analytics

You can opt-out of Google Analytics tracking through your device settings or by adjusting privacy settings in your browser. You can also disable analytics in Hi Piano's settings if this option is provided.

Right to Deletion

You can delete all app data at any time by uninstalling Hi Piano or clearing app cache/data from your device settings. Once deleted, the data cannot be recovered.

Third-Party Links

Hi Piano may contain links to other websites or applications that are not operated by me. If you click on a third party link, you will be directed to that third party's site. I strongly advise you to review the Privacy Policy of every site you visit.

I have no control over and assume no responsibility for the content, privacy policies, or practices of any third party sites or services.

Changes to This Privacy Policy

I may update this Privacy Policy from time to time. I will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date at the top of this Privacy Policy.

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.

Contact Me

If you have any questions or concerns about this Privacy Policy, please feel free to contact me:

  • Email: hieunguyenute2@gmail.com