1. Acceptance of terms
By downloading or using TrayZen ("the App"), you agree to these Terms & Conditions ("Terms"). If you do not agree, do not use the App.
2. Who we are
The App is developed and published by Jakub Růžička, an individual entrepreneur ("Developer", "we", "us") based in the Czech Republic. For contact details, see §11.
3. Licence
Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable licence to install and use the App on devices you own or control, for your personal, non-commercial use.
You may not:
- Copy, modify, or distribute the App
- Reverse-engineer, decompile, or attempt to extract the source code
- Remove or alter proprietary notices
- Use the App for any unlawful purpose
4. In-app purchases
4.1 Optional features
The App is free to download and use. Optional features are available as one-time in-app purchases ("Add-ons") processed by Apple App Store or Google Play. Current prices are shown in the App Store or Google Play at the time of purchase and may vary by region.
4.2 No subscription
There is no subscription. All Add-on purchases are one-time. You will never be charged a recurring fee for TrayZen.
4.3 EU right of withdrawal
If you are a consumer in the European Union, you have the right to withdraw from a purchase within 14 days without giving a reason, unless you have already started using the digital content and have expressly acknowledged that your right of withdrawal will thereby lapse. Because Add-ons are activated immediately on purchase, by completing the purchase you acknowledge and agree that performance has begun and your right of withdrawal lapses at that point.
If you have not yet activated the Add-on, you may contact us within 14 days to request a refund, and we will process it via the App Store or Google Play.
4.4 Refunds after 14 days
Refunds after the 14-day window are handled exclusively by Apple or Google under their respective store policies. We cannot issue refunds directly.
4.5 Restore purchases
If you reinstall the App or switch devices, you can restore your purchases via the "Restore purchases" option in the App settings.
5. No medical advice
TrayZen is a personal tracking tool and a convenience aid only. Nothing in the App constitutes medical advice. TrayZen does not replace guidance from your orthodontist. Always follow your orthodontist's instructions regarding wear time, tray changes, and treatment duration. Do not rely on the App for medical decisions.
6. Availability and updates
We aim to keep the App available and up to date, but we do not guarantee uninterrupted or error-free operation, that any particular feature will remain available, or compatibility with future iOS or Android versions. We may update, modify, or discontinue features at any time with reasonable notice of material changes.
7. Intellectual property
All content, design, code, branding, and trademarks in the App are the property of the Developer or their licensors. The TrayZen name, logo, and visual identity are protected. You may not use them without prior written permission.
8. Limitation of liability
To the maximum extent permitted by applicable law:
- The App is provided "as is" without warranties of any kind, express or implied.
- The Developer is not liable for any loss of data, indirect, incidental, special, consequential, or punitive damages arising from use of the App.
- The Developer's total liability to you for any claim arising from the App shall not exceed the amount you paid for the relevant Add-on, or €10, whichever is greater.
Nothing in these Terms limits or excludes liability that cannot be limited under applicable EU consumer law.
9. Governing law and jurisdiction
These Terms are governed by the law of the Czech Republic. Any disputes shall be subject to the exclusive jurisdiction of the courts of the Czech Republic, except where mandatory provisions of EU consumer law provide you with greater protection in your country of residence.
As a consumer in the EU, you may also use the EU Online Dispute Resolution platform.
10. Age requirements
TrayZen is rated suitable for users aged 10 and up. The app contains no violent, adult, or otherwise age-inappropriate content — it is a simple wear-time tracker for dental appliances.
Users under 16 (EU) or under 13 (US) are welcome to use the app with the knowledge and consent of a parent or guardian. No personal data is required to use TrayZen — the only identifier is an anonymous device UUID that cannot be linked to any individual.
11. Changes to these Terms
We may update these Terms. If changes are material, we will notify you via an in-app notice or by updating the "Last updated" date. Continued use of the App after the effective date constitutes acceptance of the new Terms.
12. Contact
Email: support@trayzen.eu