Privacy Policy for Duct Size Calculator

Effective date: July 23, 2026

Easy Solution Lab built Duct Size Calculator as a free, advertisement-supported application. This Privacy Policy explains what information may be collected, how it is used, and the choices available to users.

By using Duct Size Calculator, you agree to the practices described in this Privacy Policy.

Information You Enter in the App

Duct Size Calculator allows users to enter technical and project-related information, including:

Duct dimensions and airflow values

Room measurements and HVAC calculation inputs

Project names, client names, locations, and notes

Material, labor, cost, and cleaning-estimate details

Inspection checklist entries

Saved calculations and calculation history

This information is stored locally on the user’s device. Easy Solution Lab does not operate an account system or server for collecting this information.

Users should avoid entering confidential, sensitive, or personally identifiable information that is not required for a calculation.

Local Storage

The app stores projects, calculation history, preferences, and settings on the device so users can access their work later.

This locally stored information is not automatically uploaded to Easy Solution Lab. Users can remove it by deleting saved records, clearing the app’s storage through Android settings, or uninstalling the app.

Reports and Sharing

The app may allow users to create, print, save, or share calculation results as text, images, or PDF documents.

Sharing only happens when the user chooses a sharing or printing option. Information shared through email, messaging apps, cloud storage, printers, or other third-party services is handled according to the privacy policies of those services.

Easy Solution Lab does not control how third-party apps process information after a user shares it.

Advertising

Duct Size Calculator is free and supported by advertisements. The app uses Google AdMob to display app-open, interstitial, and native advertisements.

Google and its advertising partners may collect or process information such as:

Device and advertising identifiers

IP address and approximate location derived from the IP address

Device type, operating system, and app information

Advertisement impressions, clicks, and interactions

Diagnostic, performance, and fraud-prevention information

Consent and privacy preference information

This information may be used to deliver advertisements, measure ad performance, prevent fraud, maintain service security, and comply with legal requirements.

Google’s handling of information is governed by its own privacy policy and advertising terms. Google’s User Messaging Platform may also be used to request consent or provide privacy choices where required. (Google for Developers)

Consent and Privacy Choices

Where required by applicable law, the app may display a consent message before requesting personalized advertising.

Users in supported regions may be able to review or change their choices through the Privacy Choices or Manage Privacy option inside the app.

Depending on the user’s location and selected preferences, advertisements may be personalized or non-personalized. Some limited information may still be processed for security, fraud prevention, frequency control, and basic ad delivery.

Internet Access

Most HVAC calculations can be performed offline. An internet connection may be required to:

Load advertisements

Display consent or privacy messages

Open the Google Play review page

Use external sharing or printing services that require internet access

The app’s core calculation functions do not require users to create an online account.

Permissions

The app may request or use only the Android permissions needed for its operation, such as internet access for advertisements and related services.

The app does not intentionally request access to contacts, call logs, SMS messages, microphone recordings, or precise GPS location for its HVAC calculation functions.

Permissions and data practices may change if new functionality is introduced. Any significant change will be reflected in an updated version of this Privacy Policy.

Third-Party Services

Duct Size Calculator may use services provided by third parties, including:

Google AdMob

Google User Messaging Platform

Google Play services

Android printing and sharing services

These providers may process information under their own privacy policies. Easy Solution Lab is not responsible for the independent privacy practices of third-party applications or services.

Data Retention

Projects, calculation history, settings, and field records remain on the device until the user deletes them, clears the app’s data, or uninstalls the app.

Advertising and consent information processed by Google or its partners may be retained according to their own policies and legal obligations.

Data Security

Easy Solution Lab takes reasonable steps to keep the app’s local data handling limited to its intended functions. However, no device, storage system, internet transmission, or third-party service can be guaranteed to be completely secure.

Users are responsible for protecting access to their devices and reviewing information before sharing reports with others.

Children’s Privacy

Duct Size Calculator is intended for HVAC professionals, contractors, engineers, technicians, installers, estimators, and students. It is not directed toward children under the age of 13.

Easy Solution Lab does not knowingly collect personal information directly from children. A parent or guardian who believes a child has provided personal information may contact us so the matter can be reviewed.

User Rights and Data Requests

Because projects and calculations are generally stored locally, users can manage or delete them directly inside the app or through Android settings.

For questions about information processed by advertising providers, users may need to use the privacy controls offered by Google or the relevant provider.

Users may contact Easy Solution Lab to ask questions about this Privacy Policy or request assistance concerning the app’s privacy practices.

Changes to This Privacy Policy

This Privacy Policy may be updated when the app, legal requirements, advertising services, or data practices change.

Updates will be published on the app’s privacy-policy page with a revised effective date. Continued use of the app after an update means the revised policy applies.

For privacy questions, suggestions, or concerns, contact:

Developer: Easy Solution Lab

Email: adilitsolution80@gmail.com

App: Duct Size Calculator