Terms of Use for CalcGrid
Effective Date: April 26, 2026
Last Updated: April 26, 2026
Please read these Terms of Use ("Terms") carefully before using the CalcGrid application ("the App") operated by Kevin Merz ("we", "us", "our").
By downloading, installing, or using the App, you agree to be bound by these Terms. If you do not agree to these Terms, do not use the App.
1. Description of Service
CalcGrid is an iOS application that offers cross-math puzzles. The App provides:
- Algorithmically generated cross-math puzzles in multiple difficulty levels
- Daily Challenge with streak tracking
- Personal statistics and progress tracking
- Multiple visual themes
- Hints to assist with solving puzzles
- 100% offline functionality
The App is intended as an entertainment and educational puzzle game.
2. System Requirements
- iOS 17 or later
- Compatible with iPhone and iPad
3. License Grant
- We grant you a limited, non-exclusive, non-transferable license to use the App for personal, non-commercial purposes.
- You may install the App on any devices you own or control.
- This license does not include the right to modify, distribute, or create derivative works of the App.
4. Premium Subscriptions
4.1 Free vs Premium
The App offers core functionality for free, including all difficulty levels, unlimited puzzles, and the Daily Challenge. Premium features include unlimited hints, exclusive themes (Dark, Neon, Minimal, Retro), detailed statistics, and Challenge Mode.
4.2 Subscription Options
- Monthly: 1.99 EUR per month, auto-renewing
- Yearly: 14.99 EUR per year, auto-renewing
Prices may vary by region and are displayed in your local currency at the time of purchase.
4.3 Billing and Auto-Renewal
- Payment will be charged to your Apple ID account at the confirmation of purchase.
- Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period.
- Your account will be charged for renewal within 24 hours prior to the end of the current period.
- You can manage and cancel your subscriptions by going to your App Store account settings after purchase.
- No cancellation of the current subscription is allowed during the active subscription period.
4.4 Refunds
- Refunds are handled by Apple according to their refund policies.
- We do not provide direct refunds for purchases made through the App Store.
- To request a refund, visit reportaproblem.apple.com
4.5 Restore Purchases
You can restore previous subscriptions on any device signed into the same Apple ID using the "Restore Purchases" option in the app.
5. User Responsibilities
By using the App, you agree to:
- Use the App only for its intended purpose
- Not attempt to reverse engineer, decompile, or disassemble the App
- Not redistribute, sublicense, or resell the App
- Not use the App in any unlawful manner
6. Intellectual Property
- The App and all its contents, features, and functionality are owned by Kevin Merz and are protected by international copyright, trademark, and other intellectual property laws.
- The name "CalcGrid" and the app icon are trademarks of Kevin Merz.
- You may not copy, modify, distribute, sell, or lease any part of the App or its content.
7. Disclaimer of Warranties
THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED.
To the fullest extent permitted by applicable law, we disclaim all warranties, including but not limited to:
- Implied warranties of merchantability, fitness for a particular purpose, and non-infringement
- Warranties that the App will be uninterrupted, error-free, or secure
- Warranties regarding compatibility with future OS versions
8. Limitation of Liability
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW:
- We shall not be liable for any indirect, incidental, special, consequential, or punitive damages
- Our total liability shall not exceed the amount you paid for the App or subscription in the past twelve months
Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you.
9. Indemnification
You agree to indemnify, defend, and hold harmless Kevin Merz from and against any claims, liabilities, damages, losses, costs, or expenses arising out of or related to:
- Your use of the App
- Your violation of these Terms
- Your violation of any rights of another person or entity
10. Modifications to the App
We reserve the right to:
- Modify, suspend, or discontinue the App or any feature at any time without notice
- Update the App to fix bugs, add features, or comply with legal requirements
- Change subscription pricing for future renewals (existing subscriptions are unaffected during their active period; price changes for renewals will be communicated in advance per Apple's policies)
11. Termination
- You may stop using the App at any time by uninstalling it. Active subscriptions must be cancelled separately in your App Store account.
- We may terminate or suspend your access to the App at any time, without prior notice, for conduct that we believe violates these Terms.
- Upon termination, your right to use the App ceases immediately.
- Sections regarding disclaimers, limitation of liability, and indemnification survive termination.
12. Governing Law and Dispute Resolution
- Governing Law: These Terms shall be governed by and construed in accordance with the laws of Germany, without regard to its conflict of law provisions.
- Jurisdiction: Any disputes arising from these Terms or your use of the App shall be subject to the exclusive jurisdiction of the courts of Soest, Germany.
- EU Consumers: If you are a consumer in the European Union, you may also bring proceedings in your country of residence. Nothing in these Terms affects your rights as a consumer under mandatory consumer protection laws.
- Online Dispute Resolution: The European Commission provides an online dispute resolution platform at https://ec.europa.eu/consumers/odr
13. Severability
If any provision of these Terms is found to be unenforceable or invalid, that provision shall be limited or eliminated to the minimum extent necessary, and the remaining provisions shall remain in full force and effect.
14. Entire Agreement
These Terms, together with our Privacy Policy, constitute the entire agreement between you and us regarding the App and supersede any prior agreements.
15. Changes to Terms
We may update these Terms from time to time. We will notify you of material changes by updating the "Effective Date" at the top. Your continued use of the App after changes constitutes acceptance of the updated Terms.
16. Contact
For questions about these Terms, please contact:
Kevin Merz
E-Mail: MerzKevin@me.com
Web: merzkevin.de