MWSTStudio

Swiss VAT return — entirely on your device

Terms of use (EULA)

Last updated: 5 September 2026

These terms govern the agreement between you and Babala Özdemir (“we”) regarding your use of the MWSTStudio app. By installing or using the app you accept these terms. If you do not agree, please do not use the app and remove it from your device.

1. What the app does

MWSTStudio calculates the Swiss VAT return on your device using the effective method or the net tax rate method: you enter turnover, deductions, acquisition tax and input tax, and the app derives the figures of the FTA’s official return form (items 200 to 510), flags inconsistencies, shows the due dates of the filing periods and produces the finished return as a PDF. The app runs on iPhone, iPad and Mac and needs no internet connection. It is not an accounting system and files nothing — you file the return yourself in the FTA portal.

2. Licence

We grant you a non-exclusive, non-transferable, non-sublicensable and revocable right to use the app on devices you own or control, for private purposes, subject to these terms and the usage rules of the respective app store. All rights in the app, its content, text, images, illustrations, voices and source code remain with us or our licensors.

3. What is not permitted

• Reverse engineering, decompiling, disassembling or circumventing technical protection measures, except where mandatory law permits it
• Redistribution, rental, lending or transfer of the app or its content
• Automated extraction of content, or using the app to build a competing product
• Any unlawful use, and any attempt to disrupt operation, security or data integrity
• Using the app to conceal turnover or to produce returns that do not match the actual business transactions
• Subsequently falsifying generated returns or PDF output

4. Your content

All data you record in MWSTStudio belongs to you and stays on your device. We never receive it, claim no rights to it, and can neither view nor restore it. Backing up your data is therefore entirely your responsibility: keep a regular backup. If the device is lost without a backup, the return records you must keep are lost with it.

5. Price

MWSTStudio is a paid app purchased once through Apple’s App Store. There is no subscription, no in-app purchase and no fee per return. The price is shown in the App Store before you buy; the purchase is tied to your Apple account and can be restored on other devices of the same account. We receive no payment instrument data. Refunds are governed by Apple’s terms and must be requested from Apple directly. Apple’s “Licensed Application End User License Agreement” applies in addition; these terms are concluded between you and us only, with Apple as a third-party beneficiary.

6. Availability and changes

We continue to develop the app and may change, add or discontinue features. We cannot guarantee uninterrupted availability; maintenance, third-party outages or force majeure may cause interruptions. If a change permanently removes a core feature you paid for, we will inform you and seek an appropriate solution.

7. Warranty and liability

The app is developed with due care and provided “as is”. We are fully liable for damage caused intentionally or by gross negligence, and for injury to life, body or health. For slight negligence we are liable only for breach of essential contractual duties, limited to foreseeable damage typical for this type of contract. Liability for lost profit, data loss or consequential damage is excluded to the extent permitted by law. Mandatory claims under product liability law and mandatory consumer protection law remain reserved.

Please back up important data yourself. We recommend not relying solely on the app where an outage would have significant consequences.

8. Data protection

The data processed by the app is described in the Privacy policy. How to delete your data is described under Delete data.

9. Termination

You may terminate this agreement at any time by deleting the app and, where applicable, removing your account. We may suspend or terminate access if you materially or repeatedly breach these terms. In that case we refund unused prepaid amounts pro rata, unless the suspension results from a serious violation.

10. Governing law and jurisdiction

Swiss law applies, excluding the CISG and conflict-of-law rules. Place of jurisdiction is — to the extent legally permissible — our registered seat in 4414 Füllinsdorf. Mandatory places of jurisdiction for consumers at their domicile remain reserved.

11. Final provisions

If a provision of these terms is invalid, the remaining provisions stay in force. We may amend these terms when the app, the legal framework or store requirements change; material changes are announced in the app. Continued use after a change constitutes acceptance of the new version.

12. Contact