1. Introduction

CodingMSTR ("we", "our", or "us") is dedicated to protecting your privacy. This Privacy Policy explains how the Vibration Meter mobile application collects, uses, and safeguards information when you use our Android application.

By installing or using Vibration Meter, you acknowledge the terms described in this Privacy Policy.

2. Information We Collect and Process

A. On-Device Hardware Sensor Data (Non-Personal)

To provide real-time vibration analysis, frequency spectrum calculation (FFT), seismic monitoring, and machinery diagnostic baselines, the application accesses hardware motion sensors via standard Android APIs:

• Linear Acceleration & Accelerometer: Measures 3-axis ($X$, $Y$, $Z$) dynamic vibrations and calculates resultant acceleration in meters per second squared ($\text{m/s}^2$), Gravitational units ($g$), or $\text{mm/s}$.
• Sampling Frequency & Timestamps: Device sensor clock timestamps are used for digital filtering (DC Blocker, High-pass, Low-pass) and Fast Fourier Transform (FFT) harmonic calculations.

Local Processing Guarantee: All sensor raw data is analyzed entirely in real-time in your device's memory and stored locally in an on-device SQLite database inside the app's sandboxed storage. Sensor data is never uploaded to our servers.

B. Device & Diagnostic Data Collected by Third-Party SDKs

When running the application, certain technical and advertising identifiers are collected automatically by Google Play Services and Google AdMob to display advertisements, prevent fraud, and ensure app stability:

• Device Identifiers: Android Advertising ID (AAID), device model, manufacturer, operating system version, and system language.
• Network & Performance Data: IP address (used by Google to determine coarse, non-precise country/region for ad delivery and fraud prevention), network connection type, and crash diagnostics.
• Ad Interaction Data: Impressions, views, and clicks on in-app advertisements.

C. Information We DO NOT Collect

• No user accounts, logins, or passwords are required.
• No names, phone numbers, email addresses, or physical mailing addresses.
• No precise GPS location tracking.
• No access to camera, microphone, photo gallery, contacts, or SMS.

3. Third-Party Services & Advertising

To provide free access to vibration diagnostics, Vibration Meter displays advertisements served by Google AdMob. AdMob may use device identifiers and cookies to serve contextual or personalized ads based on your consent.

4. Data Storage, Security, & User Deletion Rights

100% On-Device Storage: All recorded vibration sessions, custom notes, timeline points, and machine baselines are stored in a private SQLite database on your device.

• Single Session Deletion: You can delete any individual session by tapping the trash icon on the session card in the History screen.
• Complete Database Wipe: You can erase all saved sessions, waveform points, and baselines at any time by navigating to Settings → Clear All Saved Data.
• App Uninstall: Uninstalling the app permanently purges all stored databases and application cache from your device.

5. CSV Export and Data Sharing

When you choose to export session data (via Export CSV), the application creates a standard comma-separated file in the app's secure cache directory and opens the native Android ShareSheet.

You retain full control over where this file is shared (e.g., Google Drive, Email, or local storage). We do not send a copy of your exported files to any server.

6. European Privacy Rights (GDPR / UK GDPR)

If you reside in the European Economic Area (EEA) or the United Kingdom:

• The application utilizes the Google User Messaging Platform (UMP) to request your explicit consent before loading personalized advertisements or processing advertising identifiers.
• You have the right to withdraw or change your consent choices at any time through device ad settings or by resetting your advertising identifier in your Android system settings.
• Because we do not store personal data on external servers, your rights to access, rectification, and erasure are exercised directly within the app by managing or clearing your local history.

7. California Consumer Privacy Rights (CCPA / CPRA)

Under the California Consumer Privacy Act (CCPA) and California Privacy Rights Act (CPRA):

• We do not sell personal information for monetary compensation.
• You may opt out of personalized interest-based advertising by enabling "Opt out of Ads Personalization" or "Delete advertising ID" in your Android settings (Settings → Google → Ads).

8. Children's Privacy (COPPA Compliance)

Vibration Meter is a scientific and condition-monitoring tool designed for general audiences, professionals, and hobbyists. It is not directed to children under the age of 13 (or under 16 in the European Union). We do not knowingly collect personal information from children. If you believe a child has provided personal information to third-party ad networks through our app, please contact us immediately.

9. Changes to This Privacy Policy

We may update our Privacy Policy periodically to reflect changes in our practices or applicable legal regulations. Any modifications will be updated on this page with a revised "Effective Date". We recommend reviewing this document periodically.

10. Contact Us

If you have any questions, suggestions, or concerns regarding this Privacy Policy or data privacy within Vibration Meter, please contact us:

• Email: support@codingmstr.com