MWSTStudio

Swiss VAT return — entirely on your device

Privacy policy

Last updated: 5 September 2026

MWSTStudio prepares the Swiss VAT return — entirely on your own device. There is no server, no user account, no login and no transmission to us. We as the developer receive none of your data.

In short

MWSTStudio collects no data. No server, no user account, no login, no transmission. No analytics, no statistics, no advertising, no trackers, no crash reports to us. Everything you enter stays in a file inside the app’s folder on your device.

What data does the app process?

All information comes from you; the app collects nothing on its own. It processes:

• Company details: company name, VAT number, accounting method (effective method or net tax rate), approved net tax rates and filing period.
• Turnover and input tax data: turnover lines with amount, tax rate and year of supply, deductions, acquisition tax, input tax and the resulting figures of the official return form.
• Filing periods: period, due date and the status you set (recorded, filed).

For a sole proprietorship these business and tax data are at the same time personal data of the owner. They are used solely to calculate and produce the return — never analysed, profiled or passed on.

Where it is stored: in a file inside the app’s folder on your device. We recommend protecting the device with a passcode and — on the Mac — with FileVault; that is the most effective protection for this file.

Where does this data go?

Nowhere.

The app transmits no data to us. There is no server of ours, no cloud sync and no interface to third parties or to the FTA. Your data leaves the device only when you hand it over yourself:

• when you export, print or send the return as PDF,
• when you enter the calculated figures in the FTA portal yourself,
• when you copy the app’s data file or include it in a backup.

What happens to such a file afterwards — e-mail, printer, cloud folder, fiduciary — is entirely up to you. From that moment the privacy terms of the service you chose apply.

Backups

If iCloud Backup (iOS) or Time Machine or another backup (macOS) is enabled on your device, MWSTStudio’s data file may be included in that backup. This is a setting of your device, not a feature of the app — the app backs up nothing on its own, and we have no access to such a backup.

A backup is sensible: if the device is lost, so are the return records you must keep as a taxable person. If you nevertheless do not want it, disable the backup for MWSTStudio in your system settings and instead keep your own regular copy in a safe place.

Your rights

Access, rectification, erasure, restriction, objection and data portability always have to be addressed to the party that processes the data. We hold no data from MWSTStudio — so there is nothing to request from us, and we could not provide any information even if asked.

You exercise your rights directly in the app, at any time and without us:

• view all recorded data,
• change or correct it,
• export the return as PDF — which is also your data portability,
• delete individual entries, or everything by removing the app.

Step-by-step instructions are under “Delete data” at the top of this page.

Responsible for the data processing

MWSTStudio is merely a local tool on your device for that purpose, comparable to a spreadsheet. We are neither a processor nor a recipient of this data, because it never reaches us. A data processing agreement is therefore unnecessary and would have no subject matter.

As the controller you are responsible in particular for:

• recording only as much data as the return actually requires;
• adequately protecting the device and the exported files (device passcode, FileVault, no open distribution lists);
• keeping books, receipts and return records for the statutory periods (Art. 70 Swiss VAT Act, Art. 958f Swiss CO) and filing the return with the FTA on time.

Responsible for the app itself — its provision, how it works and this policy — is:

Contact

We are happy to answer questions about the app, this policy or the calculations. Please do not include any turnover or tax data — we do not need it and do not want to receive it.

E-mail: info@babala.ch · Phone: 076 222 45 99

Last updated: 5 September 2026. We adapt this policy when the app or the legal framework changes; the version published here is the applicable one.