Terms of service

Last updated: 13 September 2026.

1. Who we are

Stud Stacks is operated by Frederick Blake, trading as a sole trader in England, registered with the Information Commissioner's Office under number ZC233764. Contact: support@studstacks.app.

2. What Stud Stacks is

Stud Stacks is an app for cataloguing a personal collection of LEGO® sets and minifigures and viewing an estimate of their resale value. It is provided for personal, non-commercial use.

3. Valuations are estimates

Values shown in Stud Stacks are estimates derived from recent completed sales on third-party marketplaces, principally BrickLink. They are not offers to buy, appraisals, or guarantees of what any item will sell for. Sale prices for the same item vary widely between individual transactions. Where the app shows the number of sales a value is based on, or marks a value as provisional, that information is part of the estimate and should be read with it.

Identification of items from photographs is automated and can be wrong. You should confirm an identification before relying on it, and you can correct one in the app at any time.

You should not make financial, insurance or purchasing decisions on the basis of a Stud Stacks valuation alone.

4. Your account and your data

You need an account to use Stud Stacks. You are responsible for keeping your login details secure. You can export your collection at any time and delete your account from within the app, which permanently removes your collection, scans and account. How we handle personal data is set out in our privacy policy.

5. Subscriptions

Stud Stacks is currently free while in early access. If a paid tier is introduced, purchases made through the App Store are governed by Apple's standard end-user licence agreement (apple.com/legal/internet-services/itunes/dev/stdeula) and managed, including cancellation and refunds, through your Apple ID.

6. Acceptable use

You agree not to:

• use automated means to extract catalogue or price data from the service in bulk;
• attempt to interfere with, overload or gain unauthorised access to the service;
• use the service for any unlawful purpose.

7. Availability and changes

We aim to keep Stud Stacks available but do not guarantee uninterrupted service. Price data depends on third-party sources that may change or become unavailable. We may change or withdraw features, and we will give reasonable notice of any change that materially affects you.

8. Liability

Nothing in these terms limits liability that cannot lawfully be limited. Subject to that, we are not liable for any loss arising from reliance on a valuation or identification, or for indirect or consequential loss. Our total liability to you in connection with the service is limited to the amount you have paid us in the twelve months before the claim, or £50 if greater.

9. Governing law

These terms are governed by the law of England and Wales, and the courts of England and Wales have jurisdiction. If you are a consumer, you also have the protection of the mandatory consumer law of the country you live in.

10. LEGO® trademark disclaimer

Stud Stacks is an independent product for collectors of construction-toy products, including but not limited to LEGO® branded sets and minifigures. Stud Stacks is not affiliated with, endorsed, sponsored, licensed by, or otherwise connected to The LEGO Group of Companies. LEGO®, the LEGO® logo, the Minifigure figure, the Brick and Knob configurations, and NINJAGO®, TECHNIC®, DUPLO®, MINDSTORMS®, LEGOLAND®, and BIONICLE® are trademarks and/or copyrights of The LEGO Group of Companies. All references to LEGO® products in Stud Stacks are for identification purposes only, in line with fair use / nominative use.