MAS vInvoice - Privacy Policy
Last updated: 8 October 2026
This privacy policy explains how the MAS vInvoice mobile application ("the app") handles information. The app is published by MasterSoft (H.K.) Limited ("MasterSoft", "we", "us") as part of the MAS product suite.
On Google Play, the app is distributed by our affiliate Salezbird, which develops the MAS mobile apps and appears as the developer on that store. Both companies are part of the same group and handle your information under this policy.
MAS vInvoice is a mobile sales-document tool for MAS, business software sold by MasterSoft to companies of all sizes across a wide range of industries. Existing MAS customers activate the app with a code issued by their company administrator. Anyone interested in MAS can also send an enquiry from the app's first screen without activating it.
Summary
The app does not collect personal information about you from normal use.
The app lets you view, create and edit your employer's own sales documents (quotations, sales confirmations and invoices), which may include business contact details belonging to other people. Your employer controls that information.
If you choose to send an enquiry, we collect only the contact details you type into that form.
The app does not use analytics, advertising, or tracking of any kind.
The app does not share any data with third parties for their own purposes.
The only information stored on the device is an activation token and your company's identity, used to keep you signed in, plus your language and theme preferences.
All communication with our servers uses encrypted HTTPS.
Information the app collects
Normal use (sales documents)
The app does not ask for, collect, or transmit any personal information about you in order to work with sales documents. There is no account registration, no name, no email address, no phone number, and no payment details.
Access is granted by an activation code issued to you by your company's administrator. The code identifies your company, not you as an individual. We do not know which individual person is using a given device. An activation may be limited to a particular sales representative's documents, in which case the app shows only that subset.
The app does not access your location, camera, microphone, contacts, photos, files, or any other personal data on your device. On Android it requests only two permissions:
INTERNET - to retrieve and save sales documents on the server.
ACCESS_NETWORK_STATE - to detect whether the device is online and show a clear error if not.
Neither permission gives access to personal data. The app requests no privacy-sensitive permissions on iOS.
The app can prepare an email of a document for you. This opens your device's own mail app with the document text filled in and unsent; you review it and decide whether to send it. The app does not send email itself, does not read your mailbox, and does not record whether you sent it.
Sales documents and customer records
MAS vInvoice works with sales documents held in your employer's own MAS system. Those documents may include business contact information about other people, such as a customer's name, address, contact person and telephone number, together with the products, quantities and prices on the document.
When you create, convert or edit a document, the details you enter are saved into your employer's MAS system. Totals are calculated by that system, not by the app.
Your employer is the data controller for that information. Your employer decides what is recorded, who may see it, and how long it is kept. MasterSoft handles it only on your employer's instructions, as its data processor. We do not use it for our own purposes.
To prevent the same document being created twice when a connection drops, our server keeps a short-lived technical record of each save request and its result for up to 30 days. This record belongs to your employer's data, contains no information about you as an individual, and is used for no other purpose.
The optional enquiry form
The app's first screen offers an enquiry option for people who do not have an activation code and would like to know more about MAS. This form is entirely optional. You can use the app without ever opening it, and it is not shown once the app is activated.
If you choose to submit an enquiry, we collect only what you type into the form:
Company name (required)
Your name (required)
Email address (required)
Phone number (optional)
Your message (optional)
Purpose. This information is used solely to respond to your enquiry about MAS products. It is sent to MasterSoft's sales enquiry mailbox.
Legal basis. We process these details on the basis of your consent, given by submitting the form, and our legitimate interest in responding to a business enquiry.
We do not use enquiry details for advertising, add them to a marketing list without your agreement, sell them, or share them with third parties for those parties' own purposes.
The form also contains a single hidden field used to detect automated spam submissions. It is invisible to people and is expected to be left empty; nothing you can see or type is affected.
Information stored on your device
When you activate the app, the following is stored locally using the operating system's secure storage (Android Keystore, or the iOS Keychain):
An activation token, so you do not have to re-enter the activation code each time.
Your company code and company name, to display and to address requests correctly.
The sales representative code your activation is limited to, if any, so the app can show which documents you are seeing.
The following non-sensitive preferences are also stored on the device:
Your chosen language.
Your chosen theme (light or dark).
Documents themselves are not kept in a separate database on the device; they are retrieved from the server as you browse and saved to the server when you submit them.
This information stays on your device. It is removed when you deactivate the app from within the app, or when you uninstall it.
Enquiry form details are not stored on the device. They are sent to us and then cleared.
Information sent to our servers
When you use the app, it contacts the MAS API at https://api.mastersoft-hk.com to:
Validate your activation code when you first activate.
Retrieve sales documents, customers and products for your company only.
Save documents you create, convert or edit into your company's MAS system.
Deliver an enquiry, if and only if you choose to submit the enquiry form.
Requests carry the activation token so the server can identify which company's data to use, and which sales representative's documents to include where the activation is limited in that way. No personal identifiers about you are transmitted with those requests.
Where the data is held. The MAS database is hosted for your employer by MasterSoft on Microsoft Azure. Microsoft acts as our hosting sub-processor and does not use the data for its own purposes.
We protect the hosted database with access controls and encryption in transit, we do not use your employer's business data for our own purposes, and we do not sell it or disclose it to anyone except as your employer instructs or the law requires.
Analytics, advertising and tracking
The app contains no analytics SDK, no crash-reporting SDK, no advertising, and no third-party tracking libraries. Nothing about your usage is profiled, sold, or shared, and no data is used for advertising. We do not track you across other apps or websites.
Data sharing
We do not sell or rent your information, and we do not share it with third parties for their own purposes. We use a small number of service providers who process data only on our instructions:
Microsoft Azure - hosting for the MAS API and the MAS database.
An email relay provider - used only to deliver enquiry form submissions to us.
Neither uses the data for its own purposes.
Security
All communication between the app and our servers is encrypted using HTTPS (TLS). The app is built so that it can only connect to the production API over an encrypted connection; plain, unencrypted connections are blocked.
The activation token is held in the operating system's secure storage, which is protected by the device's own security.
Because the app shows and changes your employer's sales documents, treat your device as you would any other business record. Deactivate the app from within its Settings screen if you lose the device or stop using it for work, and ask your company's MAS administrator to revoke the activation.
Data retention
The activation token and cached company details remain on the device until you deactivate the app or uninstall it. Your company's administrator can revoke an activation at any time, which immediately invalidates the token on the device.
Enquiry details are retained only for as long as needed to deal with your enquiry and to keep a record of the business correspondence, and are then deleted.
Your employer's sales documents are retained in the MAS database under our agreement with your employer. We delete or return them afterwards in line with that agreement.
Children
MAS vInvoice is a workplace tool intended for business use. It is not directed at children and is not intended for anyone under 16.
Your rights
If you have submitted an enquiry, you may ask us to provide a copy of the details you sent, correct them, or delete them. Contact us using the details below and we will action the request.
Apart from enquiry submissions, the app does not collect personal information about you, so there is normally no personal data for us to provide, correct, or delete.
The customer and document information shown in the app is controlled by your employer. If you are a person named in a MAS customer record or document and wish to access, correct or delete your details, please contact the company that holds the record - that company is the data controller. If you contact us instead, we will pass the request on to them.
If you wish to have your own device's access revoked, please contact your company's MAS administrator.
Changes to this policy
If this policy changes, the "Last updated" date above will be revised. Significant changes will be communicated through your company's administrator.
Contact
Questions about this privacy policy or the app's handling of data:
MasterSoft (H.K.) Limited
Email: enquiry@mastersoft-hk.com
Website: https://www.mastersoft-hk.com
Address: 89 Queensway, Admiralty, Hong Kong
MAS vInvoice is a MasterSoft product.