Terms and licence

Last updated 28 October 2026

1. Who we are

Gridbinder is operated by ARLing s. r. o., Ivanská cesta 32E, 821 04 Bratislava, Slovakia, Company ID 56583486, VAT ID SK2122352100 ("we"). Contact: support@arling.sk.

2. The service

Gridbinder is software that runs in your web browser and makes puzzle book interiors and tap-through e-ink editions as PDF files. The puzzles and the PDF are created on your own device. We do not receive or store your books.

3. Plans, payment and cancelling

• The free sample is limited to 12 puzzles per book and carries a SAMPLE watermark. It is for evaluation only and may not be sold.
• Paid plans are subscriptions billed monthly or yearly in advance. The price on the website is the final price in US dollars and includes any VAT or sales tax. The checkout may offer to charge you in your local currency instead; according to Stripe, its exchange rate then includes a conversion fee of 2 to 4 percent, which you avoid by choosing US dollars at checkout (your bank may then apply its own exchange rate).
• Payment runs through Stripe Managed Payments: the seller at checkout (merchant of record) is Link (Sold through Link, LLC), which takes the payment under its own terms, handles the tax and sends you the receipt; we supply the service. Your card statement shows LINK.COM followed by our company name.
• A subscription renews automatically until you cancel. You can cancel at any time in the Stripe customer portal (the studio links to it next to your licence key), in your Link account at link.com, or by writing to us. You keep access until the end of the period you paid for.
• If Gridbinder is not for you, for any reason, write to us within 14 days of your first payment and we will refund that payment.
• Your licence key is stored in your browser. It confirms your subscription and is renewed automatically, in the browser you subscribed with, while the subscription is paid. You can copy the key from the studio to use it on another computer; if a key expires or is lost while your subscription is paid, write to us from the e-mail you paid with and we will send a new one.

4. Commercial licence for the books you make

For every book, PDF or printable you make with an active paid plan ("your book"), we grant you a worldwide, non-exclusive, perpetual licence to reproduce, publish, sell and distribute the puzzles, solutions and page layouts in it as part of your own publications.

• You may sell your books in print or digitally, on Amazon KDP, Etsy, Gumroad, your own website or anywhere else, under your own name or brand.
• No royalties are due and no credit to Gridbinder or ARLing is required.
• The licence continues after your subscription ends for books you made while it was active.
• You may edit, combine and add your own content to your books.

You may not:

• sell, license or give away the puzzles as raw content for others to republish, for example as puzzle packs, private label rights (PLR) content, templates or data sets;
• use Gridbinder to offer a puzzle generating service to others;
• sell or publish free samples, or remove the sample watermark;
• share your licence key with people outside your own business.

You are responsible for your titles, covers, descriptions and for following the rules of the marketplaces you sell on.

5. Unique puzzles

Your puzzles are made from a seed that combines your subscription, the book code and each puzzle's type, level and position, so other Gridbinder customers do not receive the same puzzles. Puzzles with very small grids have a limited number of possible layouts, so we cannot promise that no one anywhere will ever publish an identical small puzzle.

6. Quality and liability

Every puzzle is checked by a solver and kept only if it has exactly one solution; the Verification report in the book says how each one was checked. The print edition follows the published Amazon KDP interior requirements for paperbacks without bleed. The e-ink edition is a PDF for you to sell or use; it is not a KDP book format, and links work in PDF viewers that support them. Marketplaces decide on their own what they accept, and we do not promise any sales. Please review every book in the marketplace previewer before publishing.

To the extent the law allows, our total liability is limited to the amount you paid us in the 12 months before the claim. Nothing in these terms limits rights that consumers have under mandatory law.

7. Fonts

Books use the Atkinson Hyperlegible typeface by the Braille Institute, licensed under the SIL Open Font License 1.1, which allows embedding it in documents you sell.

8. Changes and law

We may update these terms; changes apply to new billing periods and we will show the date of the last change on this page. Slovak law applies, without depriving consumers of the protection of the law of their country of residence.