Last updated: October 10, 2026
BuildNuma is developed and published by One Eyed Raven Studio, an independent studio operated by Patryk Orchowski in Poland.
For matters concerning privacy and personal data, contact:
oneeyedravenstudio@outlook.com
BuildNuma is a construction calculator designed for calculations, measurements, material estimation and related construction tasks.
The application works offline for calculations and local data storage. It does not require a separate user account, display advertisements or use publisher-operated behavioral analytics.
An optional one-time purchase unlocks lifetime PRO features through Google Play Billing.
BuildNuma may store the following information locally:
Measurement units, language and application preferences.
Calculations, calculation history and favorites.
Saved projects, quantities, estimates and prices entered by users.
PRO trial timing and information needed to recognize an existing PRO purchase.
Calculations, project names, history, favorites and saved prices are not automatically transmitted to servers operated by One Eyed Raven Studio.
Locally stored information may be removed when you delete it within the application, clear the application's data or uninstall the application. Device-backup services may separately retain copies according to your Android and Google settings.
BuildNuma uses Google Play Billing to provide an optional, non-consumable lifetime PRO purchase.
Google Play processes payments and manages purchase records. BuildNuma may receive product information, purchase status, purchase tokens and signed purchase data necessary to verify, acknowledge and restore purchases.
BuildNuma does not receive your credit card number or Google account password.
Purchase information may be retained in private application storage so that purchased PRO features can remain available offline. The application does not operate its own purchase-verification server.
Google Play Billing and associated Google components may process technical, operational and diagnostic information relating to purchase services.
For more information, see Google's Privacy Policy.
BuildNuma allows users to initiate copying, sharing, exporting and importing information.
Backup files may contain project names, calculations, results, history, favorites and saved prices.
Users choose when to create, export or share this information. When a third-party application, storage provider or sharing service is selected, that provider's privacy practices also apply.
Trial status and purchase receipts are not included in exported calculation and project backups.
BuildNuma does not request access to your precise location, camera, contacts or unrestricted device storage.
Google Play Billing uses internet and network-related functionality to manage purchases and restore entitlements.
Construction calculations and locally saved information remain accessible offline, subject to the application's available features and purchase status.
One Eyed Raven Studio does not sell users' personal information.
The studio does not operate its own server for collecting construction calculations, project details or saved prices.
Information necessary for Google Play purchases may be processed by Google under its own privacy practices.
Users may also choose to share information with third-party applications or services.
We take reasonable measures to limit the information handled directly by the studio. However, no method of electronic storage or transmission can be guaranteed completely secure.
Locally stored records remain on your device until removed or overwritten.
You can delete relevant projects and calculation history within BuildNuma, or remove application data using Android settings.
Google Play purchase and transaction records are managed according to Google's policies and applicable legal requirements.
If you contact our support email, we may retain your message and contact information for responding to your request and meeting applicable legal obligations.
To request deletion of support correspondence held directly by One Eyed Raven Studio, contact us by email.
Depending on applicable law, including the GDPR, you may have rights to access, correct, delete, restrict or object to the processing of your personal information.
For requests concerning information handled directly by One Eyed Raven Studio, contact:
oneeyedravenstudio@outlook.com
Requests concerning data independently processed by Google should be directed to Google's privacy tools or support channels.
BuildNuma is intended as a construction and professional utility application and is not specifically designed or marketed for children.
The application does not require users to create accounts or submit personal information to the studio.
We may update this Privacy Policy when application functionality, third-party services or legal requirements change.
Updates will be published on this page with a revised date.