Operator of Technical Maintenance Mastergaz: Engineering for People!
Effective date: 19 October 2026.
This policy explains personal data processing in the MG Home customer app, the MG Personal technician app, and related Mastergaz account screens and customer forms that link to this page. Features depend on the version, platform and your assigned role.
The personal data controller is ТОВ «Мастергаз» (MASTERGAS LLC), Ukrainian registration code 38321792. Contact for personal data matters: info@mastergaz.com.ua. Requests are handled by the Mastergaz contact centre.
Postal address: office 623, 6A Larysy Rudenko Street, Kyiv, 02141, Ukraine. In-person office appointments are temporarily suspended; please use email or post.
Sign-in and account operation involve your phone number, sign-in verification data and account identifier. Your profile may contain the first name, surname, patronymic and email address you provide.
Service coordination involves property addresses and associated details, your selected service, description of the issue, preferred time, requests, orders, comments and uploaded files, including photos. We use this information to prepare estimates, agree and perform work, and show its status and outcome.
If payment is available and you open a payment page, the relevant bank or payment provider processes the payment details you enter there under its own rules. Before entering details, check the provider name, page address and its privacy policy. Mastergaz processes the settlement and payment-result information needed to service the order.
MG Personal is intended for Mastergaz technicians. Sign-in and work access involve authentication data, an account identifier and work account information. Available features and data depend on the assigned work role.
Assignments involve order and property details, necessary customer contact details, work timing, assignments and status. Technicians submit reports, comments and evidence of work, including photos of completion documents, the property and completed work, and the amount stated in the report. The purposes are work organisation, coordination, accounting and confirmation of results.
Customer contact details are provided for the relevant assignment. They must not be used for personal marketing, disclosed to unrelated parties or accumulated in a personal contact database. A photo in the phone gallery is a separate local copy: deleting a file from the Mastergaz system does not itself remove that copy from the device.
For enquiry forms and quality surveys linking to this policy, we process the answers, ratings, comments, contact information and association with the relevant order that you provide. These are used to consider your request, resolve the reported problem and improve service.
Submitting a survey or using an app does not provide unlimited consent to advertising. Marketing messages require a separate applicable basis. You can opt out through the contact centre.
Network connections involve your IP address and technical request, app or browser information needed for data transmission, authentication, session management, diagnostics and security. Web screens may store cookies and local session and settings data.
The Android version of MG Home includes Google Firebase Cloud Messaging for notifications and Google Maps/Places for maps and addresses. When these components are used, Google receives necessary technical data, including an installation identifier and delivery token for notifications, address queries and technical connection information for maps. See Firebase privacy information and the Google Privacy Policy.
MG Home also includes a technical public IP address lookup through ipify. If that request runs, the service receives the connection IP address and returns it to the app. This is not permission to access GPS.
Camera, photo selection and notifications are used according to available features and operating-system permissions. You can change permissions in device settings; declining a permission may limit the related feature. Having a property address does not mean that the phone location is continuously tracked.
Authorised Mastergaz staff and service contractors, hosting providers, technical support providers and operational message delivery providers participate in processing to the extent needed for their functions. The account server infrastructure is hosted by Hetzner in Germany. Relevant providers may process data outside Ukraine subject to applicable data protection requirements. Disclosure may also occur on grounds established by law.
The main purposes are account operation, responding to enquiries, estimates and service delivery, technician coordination, work confirmation, support, security and compliance with legal obligations.
Depending on the relationship and data category, processing is based on action at your request or performance of a contract, a legal obligation, another applicable lawful basis, or consent where required. Data retained solely for a legal obligation or a specific dispute is not used for marketing.
Retention depends on the data category, processing purpose and any grounds for further retention. There is no single retention period for all information.
Account data. Profile information, contacts and settings support account operation. On request, the account and associated personal data are deleted where no lawful basis requires further retention. Temporary access suspension is not a substitute for deletion.
Orders, completion records, settlements and accounting documents. Necessary information may be retained after account deletion to meet legal and warranty obligations or handle a specific claim or dispute. Only the necessary scope is retained; once the grounds end, it is subject to deletion or irreversible anonymisation.
Technical logs and backups. Retention is determined by system protection, investigation of a specific incident and recovery needs. An archive or backup is not by itself a basis for indefinite retention. On request, we explain the applicable period and how processing ends for data still present in such copies.
Email info@mastergaz.com.ua. Specify the app — MG Home or MG Personal, the account phone number or email, and the requested action: access, correction, deletion of data or the account, restriction of processing or withdrawal of consent. Do not send your password or sign-in codes.
The contact centre will handle the request. Minimal verification that the account belongs to you may be needed to protect the data. We communicate the outcome; if some data must be retained, we explain its categories, the basis, and the applicable period or condition ending retention. Withdrawing consent ends processing based on that consent; other lawful bases are assessed separately.
This channel allows a request without reinstalling the app. Deleting a photo, address or the app from your phone is not an account deletion request.
Work access uses authentication and role restrictions; the verified app entry points transmit data over HTTPS. Do not send passwords or one-time codes in reports or comments. Sign out after using a shared device.
You have rights to information about processing, access, correction, deletion and other actions provided by Ukrainian law, and the right to contact the Ukrainian Parliament Commissioner for Human Rights or a court. Use the contact above for requests to Mastergaz.
Policy updates are published on this page with a new effective date. A change in wording does not by itself constitute your consent to a new processing purpose where separate consent is required.
