Privacy Policy for 555 Timer Calc

Introduction
555 Timer Calc ("the App") is a professional and educational mobile application developed by AntoTech ("we," "us," or "our"). This Privacy Policy explains how we handle your information when you use the App. The App is a high-precision analog electronics simulator designed for students, electronic engineers, and hobbyists. It offers real-time calculation for NE555 circuits in Astable, Monostable, and PWM modes, dynamic waveform analysis, component color code visualization, and a reverse design assistant.

By using the App, you agree to the collection and use of information in accordance with this policy. The App is designed to operate 100% offline, performing all mathematical, logical, and signal processing locally on your device. We do not transmit your circuit values, design suggestions, or BOM data to our servers.

Information We Collect

1. Information You Provide

Component Values for Simulation: When you input values for resistors (R1, Ra, Rb) or capacitors (C), the data is processed in real-time locally to generate frequency, duty cycle, and period results. This information is processed in the active state and is not stored beyond your current session unless saved via local cache.
Design Assistant Inputs: Data generated during the Reverse Design mode (Target Frequency, Target Time) is processed locally to provide commercial component suggestions.
Persistence: To allow you to resume your work, your most recent component values, selected E-Series, and calculation results are stored locally on your device using localStorage.

2. Hardware and System Access

Social Sharing & Clipboard API: The App accesses the device's sharing system and clipboard only when you explicitly trigger the "Generate BOM" or "Export CSV" buttons. This is used to transfer your results to external apps of your choice.
Storage Access: The App uses local browser storage (localStorage) to maintain your preferences (Language, Component Values, Series Selection) without requiring external file system permissions.
No Camera/Microphone Usage: The App DOES NOT require or use the camera or microphone. All interactions are performed via manual digital and slider inputs.

3. Automatically Collected Information

Device and Usage Data: The App may utilize non-personal information (device model, screen resolution) to ensure compatibility and performance optimization across different mobile displays.
Local Preferences: We use localStorage to remember your settings, such as:
- Language preference (English/Spanish).
- IC Technology (Bipolar/CMOS).
- E-Series preference (E12/E24).
- Last used calculation mode.

How We Use Your Information

To Provide App Functionality: To calculate electronic parameters, generate signal waveforms using Recharts, and provide estimated power consumption.
Technical Warnings: To provide local, rule-based alerts (e.g., high frequency or power dissipation warnings) based on your inputs.
BOM Generation: To format your circuit data into a sharable Bill of Materials for your physical builds.

Sharing of Information

Third-Party Services: The App operates independently. We do not use third-party analytics that track your personal identity.
User-Triggered Sharing: Information is shared with third parties only when you explicitly use the "Share" or "Export" functions to send data via your preferred email, messaging, or cloud apps.
Legal Requirements: We do not store personal data or calculation history on our servers; therefore, we have no data to provide to third-party authorities.

Data Security

Local Processing: All mathematical processing occurs strictly on your device.
Local Storage: Be aware that saved preferences stay on the device. If you uninstall the App or clear your app cache, this data will be permanently deleted.
Physical Security: We recommend securing your device with a PIN, pattern, or biometric lock to protect your local design configurations.

Children's Privacy
The App is a tool intended for students and electronics enthusiasts. We do not knowingly collect personal information from children under 13, as the app does not feature user accounts, cloud synchronization, or data tracking.

Your Rights and Choices

Access and Control: You have full control over your data. You can change your settings or reset component values directly within the App interface.
Data Deletion: Simply clearing the App data in your device settings or uninstalling the App will remove all locally stored preferences.

Changes to This Privacy Policy
We may update this Privacy Policy to reflect changes in our practices or for legal reasons. The updated version will be accessible within the App settings.