Last updated: 11 October 2026
Messages sent by email
If you email us, the operator receives your email address and message to answer your request. The contact email uses a free Google Gmail account, rather than Google Workspace. Avoid sensitive information or third-party data. Messages are retained as needed to handle the request and applicable obligations; request deletion through the same channel. Specific retention periods and applicable legal bases need to be documented according to the activity and jurisdiction.
Controller and scope
Rodrigo Isac operates the project. This policy explains the site’s current data handling. Send privacy questions and requests to infointegralpaso@gmail.com. The operator is established in Madrid, Spain. Identification and address details appear in the legal notice.
Calculations, history and progress
Expressions are solved in your browser. History, favorites and practice progress are saved in IndexedDB, a database on your device. New calculations and progress are not sent to the server for storage. There is no user account or device synchronization.
Language and theme are retained in local storage. Practice may retain temporary data during the session. Error reports are only prepared and copied: copying does not send the text or notify the operator.
Connections and technical providers
Hosting uses Sites and its infrastructure. When the engine starts, the browser downloads Pyodide and SymPy components from jsDelivr. Hosting and download providers receive technical connection data such as IP address and ordinary request information. Integrals are not sent to the CDN for calculation.
The operator does not yet have a verified provider-log retention period or a complete account of processing locations and international-transfer safeguards. This information must be clarified before commercial operation. Technical logs are not assumed to be anonymous.
Purposes and retention
Device storage lets you resume problems, retain favorites and remember chosen settings. Local data remains until replaced by history limits, deleted through the site or removed with browser data. The browser may evict it; retention is not guaranteed.
Technical connections enable delivery and protection of the service. Applicable legal bases for any personal-data processing by the operator, together with provider retention periods, remain to be documented according to the activity and jurisdiction. Generic consent is not requested as a justification for all processing.
Backups, deletion and earlier versions
Download a backup from History or Learn and restore it in another browser. Keep that file private: it contains saved problems and progress. Delete my saved data removes local history, favorites and progress but keeps language and theme. To remove settings too, clear this site’s browser data.
Earlier versions stored anonymous server records using an ip_session cookie. Moving to local storage did not delete those records or import them automatically. Local deletion does not delete old server records. Their review and handling remain pending before monetization.
Rights, minors and changes
Where data-protection rules apply, you may exercise access, rectification, erasure, restriction, objection and portability rights as provided by those rules. Contact the operator at infointegralpaso@gmail.com; local data can be managed directly in the browser. You may contact the competent supervisory authority, including the AEPD where applicable.
Students under age may use the tool without registration. Do not enter names, contact details or other personal information in expressions or reports. Advertising, advertising analytics, photo uploads and the AI tutor are inactive. Any activation changing this processing requires updating this policy and managing consent where necessary.