Privacy Policy

1. Introduction

Engineering Toolkit is an engineering utility application developed by RobMac Software.

We respect user privacy and aim to provide practical engineering tools without unnecessary collection of personal information.

This Privacy Policy explains how Engineering Toolkit processes, stores, and handles information when users interact with the application.

RobMac Software is an independent software development brand operated by an individual business owner. Privacy is a permanent product principle: RobMac Software will not collect unnecessary personal information or introduce advertising or analytics tracking into Engineering Toolkit.

2. Data Collection and Sharing

Engineering Toolkit operates offline and does not require users to create an account.

The application does not automatically collect or transmit user information to RobMac Software or external servers.

Engineering Toolkit does not incorporate advertising services, analytics platforms, crash-reporting services, or cloud synchronization.

Calculator inputs and results are processed locally on the user's device.

The application does not automatically transmit calculation data to RobMac Software or third-party analytics or advertising services.

Certain user-initiated actions, such as copying a result to the clipboard, may make information available to the operating system or other applications, as explained below.

Engineering Toolkit is free forever. Contributions are entirely voluntary and are intended to support software development and maintenance. All functionality remains available without contributing. Contributions do not unlock functionality, content, services, privileges or rewards.

External browser. Selecting Support Development opens the official RobMac Software support page in an external browser. The app passes only this public URL, without calculation values, personal information or tracking parameters. The website provides navigation to its Spanish equivalent. Calculators and existing offline functionality remain available without visiting the website or contributing. The external browser may process network information, cookies and browsing history under its own settings and applicable policies.

Website hosting. The support website is hosted on GitHub Pages. The browser and hosting service may process network information, such as an IP address, under their applicable policies. The support pages contain no payment forms, embedded payment processing, advertising, analytics or tracking tools. Payments take place on the selected provider’s external website.

PayPal. PayPal handles contributions offered in US dollars (USD) for international support. PayPal may process personal information, payment details and transaction information under its own terms and privacy notice. Availability and applicable terms depend on your location and the selected checkout.

Mercado Pago. Mercado Pago handles contributions offered in Mexican pesos (MXN) for support from Mexico. Mercado Pago may process personal information, payment details and transaction information under its own terms and privacy declaration.

Provider privacy references: PayPal privacy notice (Mexico reference) and Mercado Pago privacy declaration (Mexico reference). These references are provided through the providers’ Mexico sites; country-specific notices or additional terms may apply to your checkout. Do not assume that the Mexico references apply identically to every international contributor. Review the applicable notice presented by your selected provider before entering information.

Information inside the app. Engineering Toolkit has no embedded checkout or payment SDK, does not collect financial information inside the app, and does not receive contribution amounts, transaction identifiers, contributor identities, payment results or transaction histories.

Merchant accounts. RobMac Software’s owner may access contributor and transaction information made available through PayPal or Mercado Pago merchant accounts, outside Engineering Toolkit. The information available depends on the provider and transaction. RobMac Software will use merchant information only to administer contributions, handle payment-related inquiries or incidents, and meet applicable legal and tax obligations.

RobMac Software’s commitments. RobMac Software will not sell personal information, use contributor data for advertising, or create contributor profiles for commercial targeting. These commitments apply to processing controlled by RobMac Software; they do not govern the independent practices of payment providers, browsers, operating systems or hosting services.

3. Local Data Storage

Engineering Toolkit stores limited information locally on the user's device to support application functionality and preferences.

This information includes:

• Appearance and theme preferences.
• Identifiers of favorite calculators.
• Identifiers of recently used calculators.

Calculator inputs, calculation results, substitutions, searches, and other temporary calculation information are processed in application memory during the relevant session.

This calculation information is not persistently stored as part of the application's local preferences.

RobMac Software does not operate a remote database containing user calculations or application preferences.

4. Clipboard Functionality

Engineering Toolkit allows users to copy calculation results to the device clipboard.

This operation occurs only when the user explicitly selects the Copy result action.

Copied information may include the calculator name, result name or symbol, calculated value, unit when applicable, and calculation substitution.

The substitution may contain values entered by the user.

Once copied, this information is managed by the device's operating system.

Depending on the Android version, device manufacturer, keyboard application, and configured services, clipboard content may be retained, accessed, or synchronized outside Engineering Toolkit.

RobMac Software does not control how the operating system or other applications subsequently manage clipboard content.

If an external page cannot be opened, Settings offers Copy link. This action occurs only when explicitly selected and copies only the public page URL to the device clipboard. The operating-system, keyboard and other-application clipboard considerations described above also apply to these links.

5. Android Backup and Data Transfer

Engineering Toolkit is configured to disable Android's automatic application backup and exclude application data from supported standard cloud-backup and device-to-device transfer mechanisms.

These restrictions are implemented through Android's application backup settings and data extraction rules.

However, backup and transfer behavior may vary depending on the Android version, device manufacturer, and system services.

Certain manufacturer-specific or privileged transfer mechanisms may operate outside the application's configurable restrictions.

Previously created system-managed backups may also remain available according to the operating system or backup provider's policies.

RobMac Software does not provide its own cloud backup, remote restoration, or data synchronization service for Engineering Toolkit.

6. Data Retention and Deletion

Engineering Toolkit stores application preferences locally to preserve the user's selected appearance, favorite calculators, and recently used calculators.

These preferences remain available until the application's local data is cleared or the application is uninstalled, subject to the operating system's backup and restoration behavior.

Users can remove locally stored application information through their device's Android application settings by clearing Engineering Toolkit's application data.

Uninstalling the application also removes its locally stored data from the current installation under normal Android behavior.

Calculator inputs and results are maintained only during the relevant application session and are not stored as persistent calculation records.

Clearing application data or uninstalling the application does not necessarily delete backups previously created or retained by operating-system services.

Engineering Toolkit does not maintain user accounts or remotely stored calculation histories.

Clearing local application data or uninstalling Engineering Toolkit does not delete external payment records held by PayPal or Mercado Pago, or information received by RobMac Software through merchant accounts. Provider records are governed by the applicable provider’s policies. Legal and tax requirements may require records to be retained; no fixed retention period or automatic deletion of external records is promised. For questions about information handled by RobMac Software, contact robmacsoftware@gmail.com.

7. Data Security

Engineering Toolkit is designed to process calculations locally without transmitting calculation information to external servers.

Locally stored application data relies on the application storage protections and security mechanisms provided by Android and the user's device.

The effectiveness of these protections may depend on the device configuration, operating system, and security settings.

Engineering Toolkit does not require users to provide personal account credentials.

For merchant information under RobMac Software’s control, the owner intends to minimize unnecessary copies of records and restrict access. These intentions do not guarantee the security or privacy practices of external services.

8. Changes to This Privacy Policy

RobMac Software may update this Privacy Policy to reflect changes to Engineering Toolkit, its functionality, or its information-handling practices.

Any updates will be published on this page, together with the corresponding revision date.

9. Contact

For questions or concerns regarding this Privacy Policy, please contact:

RobMac Software

Email: robmacsoftware@gmail.com

Official website: https://robmacsoftware.github.io/