Terms of service

Last updated: 12 November 2026

These terms apply to ViPKM, ViLibris and ViMD (the “apps”), made by Nikola Rosić, Srđana Aleksića 29, 11070 Novi Beograd, Serbia (“VizShelf”, “we”). By downloading, trying or buying an app you agree to them.

Seller

Our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders. Paddle provides all customer service inquiries and handles returns. Paddle’s buyer terms apply to the purchase itself.

License

• One-time purchase, no subscription. A license is bought once per app and does not expire.
• One person, all their Macs. The license is for the person who bought it (or for whom it was bought), on every Mac that person uses, for personal and professional work. A team or company needs one license per person who uses the app.
• All future updates. The license includes every update of that app we publish, free of charge. We decide what goes into an update and for how long we keep developing an app; an app you already have keeps working.
• Not for resale. You may not sell, rent, share or publish your license key, or give it to someone else, unless we agree in writing.
• You may not copy or distribute the apps, or decompile or modify them, except where the law allows you to do so regardless of these terms.
• The apps contain open-source components under their own licenses; they are listed in each app’s Settings.

Free trial

Each app can be tried free for 14 days, with every feature and no account. When the trial ends the app asks for a license. Your notes and files are not deleted: they stay on your Mac, in their ordinary formats, readable by other apps.

Prices and refunds

Prices are shown on each app’s page and at checkout, where Paddle adds VAT or sales tax for your country if it applies. A launch price may apply for a limited time; the price you pay is the one shown at checkout. You can ask for a full refund within 15 days of purchase, as described in our refund policy.

Third-party services

Some features connect to services you choose, such as Anthropic’s API with your own key, Claude Desktop, iCloud Drive, Crossref, Open Library or the web pages you open. Their terms and fees apply to that use, and we are not responsible for them. AI answers can be wrong; check what matters.

Your content

Your notes and files remain yours; we do not receive them and claim no rights in them. You are responsible for the content you import, download or create, and for having the right to use it. Download videos and web pages only where you are allowed to keep them — your own, licensed or freely licensed material — and respect the terms of the site you take them from.

Warranty

We make the apps with care and fix the errors we learn about, but we cannot promise that they are free of errors or suit every purpose. Keep backups of your notes and files. Nothing in these terms limits the rights you have as a consumer under the law of the country where you live, including the statutory warranty for digital content.

Liability

To the extent the law allows, our total liability for any claim connected with an app is limited to the amount you paid for that app, and we are not liable for indirect damage or loss of data or profit. This does not limit liability for intent or gross negligence, for death or personal injury, or any other liability that cannot be limited by law.

Changes

We may update these terms; the new version is posted here with a new date. Changes do not take away a license you have already bought or the updates it includes.

Governing law

The laws of the Republic of Serbia, without prejudice to the mandatory consumer protection rules of the country where you live. If you are a consumer, you may also bring a claim in the courts of your own country.

Contact

Nikola Rosić · Srđana Aleksića 29, 11070 Novi Beograd, Serbia · support@vizshelf.com