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Terms of Use

Puzzle Collector – Last updated: August 2026

These Terms of Use govern your use of the Puzzle Collector mobile app and your purchase of the permanent unlimited-collection entitlement.

1. Provider and scope

Puzzle Collector is provided by SD Nightshift Studio. Full contact details are available in our Legal Notice.

These Terms apply to consumers and businesses obtaining Puzzle Collector through the Apple App Store or Google Play. The terms of the relevant store also apply. Mandatory law and the store terms governing payment take precedence in the event of a conflict.

2. Service

Puzzle Collector is intended for privately organising a puzzle collection. Depending on the app version, it includes capturing and managing puzzle metadata and images, barcode and on-device text recognition, ownership and solving status, timers and session history, statistics, CSV/PDF/sale exports, and local backup and restoration tools.

A user account and synchronisation with a cloud operated by us are not part of the service. Certain functions may require a compatible device, a current operating-system version, camera or file permissions, or an internet connection for purchase verification and optional analytics.

3. Free use and permanent entitlement

The free version lets you store up to 10 of your own puzzles at the same time. Deleting a puzzle makes that space available again.

A one-time in-app purchase permanently removes the collection limit (“unlimited collection”). It is not a subscription. The applicable price, currency and taxes are shown by the relevant store before purchase.

The entitlement is linked to your store account and the relevant store's restoration facilities. “Restore purchases” can be used to verify an eligible purchase again. Cross-platform transfer between the Apple App Store and Google Play is not included.

4. Contract and payment

The purchase is offered through the Apple App Store or Google Play purchase interface. The contract is concluded following the steps and terms displayed there. Payment, invoicing and refunds are handled through the relevant store; we do not receive full payment details.

The entitlement is supplied after the purchase has been confirmed successfully by the store and our purchase-verification service. Verification may be delayed by temporary connection issues. Previously confirmed entitlements may be cached locally for a limited period.

5. Withdrawal and refunds

Consumers have the statutory withdrawal rights applicable to digital content. For digital content, the right of withdrawal may expire under the applicable legal conditions if you expressly consent to performance beginning before the withdrawal period ends and acknowledge that you thereby lose that right.

Withdrawal, returns and refunds are processed technically through the store where you made the purchase. The routes offered there and your mandatory consumer rights remain unaffected. These Terms do not exclude mandatory rights to a refund, cure, price reduction or termination.

6. Licence

For as long as the app is provided, we grant you a personal, non-exclusive, non-transferable and non-sublicensable right to use Puzzle Collector on devices permitted by the store rules for private purposes.

You may not sell or rent the app; circumvent the collection limit or purchase verification; manipulate the entitlement status; or reverse engineer, decompile or modify the app except to the extent expressly permitted by law.

7. Your content and third-party rights

You retain all rights in the data, photographs, notes and export templates you enter. You grant us no licence to them because this content is not transferred to us.

You are responsible for capturing, exporting and sharing only content you are entitled to use. In particular, respect copyright, trade mark, personality and privacy rights when sharing photographs of puzzle artwork or sale material with others.

8. Local storage, backups and device changes

Collection data is stored locally on your device. You are responsible for making suitable backups and keeping them secure. The app provides a local export but does not guarantee automatic cloud backup or recovery after device loss, failure, uninstallation or reset.

Before uninstalling the app, changing devices or carrying out major system changes, create a current backup and confirm that it is available at your chosen location. Import CSV or backup files only from sources you trust.

9. Availability and changes

We aim to provide a reliable app but do not promise uninterrupted availability at all times. Maintenance, bug fixes, security requirements, changes to operating systems or stores, and events beyond our control may temporarily restrict functions.

We may update the app and modify functions for an objective reason, including security, technical development, compatibility or legal requirements, provided that the change is reasonable for you. Your statutory rights concerning adverse modifications to digital products remain unaffected.

10. Conformity and warranties

The statutory rules on conformity of digital products and statutory remedies for defects apply. Product displays and feature descriptions refer to the current app version. Minor differences in display or interaction caused by different devices or operating systems do not by themselves constitute a defect.

11. Liability

We are liable without limitation for intent and gross negligence, culpable injury to life, limb or health, under product-liability law, and within the scope of any express guarantee.

For a slightly negligent breach of essential contractual duties, liability is limited to the typical and foreseeable loss. Liability for other slight negligence is excluded to the extent permitted by law. These limits also apply to our legal representatives and agents.

For loss of data caused by slight negligence, liability is limited to the recovery cost that would have arisen had regular and appropriate backups been made. Mandatory consumer rights remain unaffected.

12. Privacy

Information about personal-data processing, optional Firebase Analytics, RevenueCat, store purchases, local images and exports is available in the App Privacy Policy.

13. Ending use

You may stop using the app at any time by uninstalling it. Back up local data first if you wish to keep it. Either party's right to terminate for cause remains unaffected. A permanent entitlement does not create a right for the app to be offered indefinitely or on every future device and operating system; statutory claims remain unaffected.

14. Governing law and jurisdiction

German law applies, excluding the UN Convention on Contracts for the International Sale of Goods. For consumers, this choice applies only to the extent that it does not deprive them of mandatory protection under the law of their country of habitual residence.

If the user is a merchant, a legal entity under public law or a special fund under public law, the provider's registered office is the exclusive place of jurisdiction to the extent permitted by law. Statutory places of jurisdiction apply to consumers.

15. Changes to these Terms

We may change these Terms for the future where required by legal, technical or functional developments, provided this does not unreasonably alter the contractual balance to your disadvantage. Changes affect completed purchases only to the extent permitted by law. The current version is published on this page.

16. Final provisions

If any provision of these Terms is wholly or partly invalid, the remaining provisions continue to apply. The invalid provision is replaced by the applicable statutory rule.