Terms of Service

Last updated: 14 November 2026

These terms apply when you use Marmelow (marmelow.com), a browser studio for designing 3D-printable lamps and lithophanes. By using the site you agree to them. If you don't agree, please don't use Marmelow.

1. Who we are

Marmelow is run by João Barradas, a sole trader in Portugal ("we", "us"). You can reach us at hello@marmelow.com.

2. Your account

• Designing is free and needs no account. Downloading files needs an account, made with your email or Google.
• One account per person. Accounts are for people aged 16 or over.
• Keep access to your email safe: anyone who can sign in to it can use your account.

3. Plans

• Free: design without limits and download up to 3 lamp files a month.
• Premium: unlimited downloads for your own use, the Fine quality setting and new models first. Premium is billed monthly or yearly in US dollars, and renews automatically until you cancel.
• Founding member price: the first 500 yearly members pay the founding price. It stays the same for as long as your subscription stays active. If you cancel and come back later, the normal price applies.
• To stop abuse, Premium has a fair-use limit of 40 downloads a day, and we limit how many free downloads can come from one internet connection.

4. Payments

Payments are handled by our reseller, Lemon Squeezy, who is the merchant of record for all orders. They process your payment, add any sales tax or VAT that applies in your country, and send your receipts. Their own buyer terms also apply to your purchase. We never see or store your card details.

You can cancel at any time from the link in your receipt or from your Marmelow account. You keep Premium until the end of the period you already paid for. For refunds, see our Refund Policy.

5. What you can do with the files

• You may not sell, share, upload or give away the files (STL, STEP, ZIP or any converted version), alone or as part of another file.
• You may not sell lamps or lithophanes printed from Marmelow files, unless we agree to it in writing (a plan for selling prints is coming).
• Each file carries a unique code linked to the account that downloaded it, so we can trace files that are shared or sold.
• Photos you use for lithophanes stay yours. You must have the right to use them.

6. Fair use of the site

Don't try to get around download limits or payments, don't use scripts or bots to download files, and don't make several accounts to get more free downloads. If you do, we may limit or close your account without a refund.

7. Printing safely

Marmelow makes design files, not finished products. Printing, wiring and using a lamp is your responsibility. Use only certified lamp kits and low-heat LED bulbs, follow the instructions that come with your electrical parts, keep printed parts away from heat sources, and never leave a lamp switched on unattended in a way that could be unsafe. If you're not sure about wiring, ask a qualified electrician. Results depend on your printer, material and settings, so we can't promise a particular print quality.

8. Our content

The Marmelow name, logo, site, shapes, presets and software belong to us. Lamps you design with our tools are made with our models, so the licence in section 5 applies to them.

9. Availability and changes

We work hard to keep Marmelow running, but we can't promise it will always be available or free of errors. We may change features. If we change these terms in a way that matters, we'll tell account holders by email before the change applies. Price changes for an active subscription only apply from your next renewal, and we'll tell you at least 30 days before.

10. Liability

Nothing in these terms limits your rights as a consumer under the law of the country you live in. Within what the law allows, we are not responsible for indirect losses, and our total responsibility to you is limited to what you paid us in the 12 months before the claim.

11. Closing your account

You can ask us to delete your account at any time by writing to hello@marmelow.com. We may close accounts that break these terms.

12. Law and complaints

These terms are governed by Portuguese law. If you live in the EU, you also keep the protection of the law of your country and can bring a claim there. If something goes wrong, please write to us first and we'll do our best to sort it out. Consumers in Portugal can also use the Livro de Reclamações Eletrónico (complaints book) or an alternative dispute resolution centre listed at consumidor.gov.pt.