Privacy Policy for SubnetCalc: IPv4 & IPv6
1. Introduction
SubnetCalc: IPv4 & IPv6 ("the App"), developed by AntoTech, is a professional utility and educational tool designed for network engineers, systems administrators, and students preparing for technical certifications (CCNA, CCNP, Network+). This Privacy Policy outlines our commitment to your data security. The App is engineered with a "Local-First" architecture, ensuring that your sensitive network configurations remain private and never leave your device.
By using the App, you agree to the collection and use of information in accordance with this policy.
2. Information Handling and Local Processing
The core philosophy of the App is Local-First Processing.
Calculation Data: Any IP addresses (IPv4/IPv6), CIDR masks, MAC addresses, or host requirements (VLSM) you input are processed in real-time using local JavaScript algorithms. This data is never transmitted to our servers or stored externally.
Persistence (Local Storage): To improve your user experience, the App saves your last calculated IP, CIDR mask, selected language, theme preference (Dark/Light), IP Detection Mode preference (Private/Public), and Practice Mode XP/Score directly on your device using localStorage. This data remains on your device until you clear the App's cache or uninstall it.
3. Hardware and System Permissions
To provide a high-quality technical experience, the App utilizes the following system features:
Haptic Feedback (Vibration API): The App uses the device's vibration motor to provide physical feedback during bit interaction and practice mode answers.
Clipboard & Social Sharing: Access to the clipboard and system sharing dialog is only triggered when you explicitly click "Copy," "Copy CLI," or "Export Table." This allows you to export CSV data or configuration commands to other professional tools.
Network Interface Access: The App utilizes system APIs to retrieve your device's Local Private IP address (LAN). This is a read-only operation performed locally on the device to assist in network configuration tasks. No data about other devices on your local network is collected, scanned, or transmitted.
Network Access: Required only for third-party services (Public IP Detection and Ads). The App does not browse your local network or access personal files.
4. IP Detection Services
The App offers two distinct modes for IP detection to assist in troubleshooting:
Private IP Detection (LAN): This mode uses a native interface plugin to read the IP address assigned to your device's internal network adapter. This process is strictly offline and local.
Public IP Detection (WAN): If you explicitly select "Public" mode, a secure HTTPS request is made to api.ipify.org (or similar services) to retrieve your exit IP address. This information is displayed directly to you and is not logged or stored by AntoTech.
5. Third-Party Services
The App integrates specific third-party services to support ongoing development:
Advertising (Google AdMob): We use Google AdMob to display "App Open" and "Banner" advertisements. AdMob may collect and use unique identifiers (such as the Android Advertising ID or iOS IDFA) to serve personalized ads. We do not have access to the personal data collected by Google. You can review Google’s Privacy & Terms for more details.
6. Data Security
No Cloud Sync: There is no user account system, cloud synchronization, or remote database. Your progress and technical calculations are as secure as your physical device.
Technical Export: Exported CSV files are generated in-memory and passed directly to your device's native sharing system. We do not maintain copies of your exported network topologies.
7. Children's Privacy
The App is a technical tool intended for students and professionals. We do not knowingly collect personal information from children under the age of 13. Since the App requires no login, we do not maintain a database of user ages or identities.
8. Your Rights and Choices
Data Deletion: You can delete all locally stored data (XP, settings, last IP, detection preferences) at any time by clearing the App's storage/cache in your device settings.
Ad Preferences: You can opt-out of personalized advertising by adjusting the "Ads" settings on your Android or iOS device.
9. Changes to This Policy
We may update this Privacy Policy to reflect new features or changes in legal requirements. Any updates will be accessible within the App's sidebar menu.
10. Contact Us
For any questions regarding this Privacy Policy or the technical operation of the App, please contact us:
Email: tech.anto19@gmail.com