Terms

Effective 10 November 2026

Who we are

Chalk is made and sold by the Chalk team ("we", "us"). You can reach us at our support address.

What you're buying

A one-time purchase of a personal license to use Chalk, a whiteboard app for macOS 13 or newer that works with Claude Code, plus every update we release for version 1. There's no subscription and no account. After checkout you get your license key and install command on the page you land on and by email.

Your license

• The license is for one person. You may install and use Chalk on any Macs you personally use, for personal or work projects.
• For a team, buy one license for each person who uses Chalk.
• Keep your license key to yourself. Don't share it, publish it, sell it or give it away.
• Don't remove or get around the license check, and don't resell or redistribute Chalk or your key.
• Chalk itself isn't open source. The licence file that comes with it says the same as these terms.
• Chalk includes open source parts, such as Excalidraw and the Nunito font, which come with their own licenses. Nothing here limits what those licenses let you do with those parts.

Claude Code and Anthropic

Chalk needs Claude Code, which you get from Anthropic under Anthropic's own terms. Chalk isn't made by or affiliated with Anthropic. What Claude reads from your board is sent to Anthropic the same way your prompts are, under your agreement with Anthropic, and any Claude usage it takes counts toward your own Claude plan.

Payment

Payments are handled by Stripe. The price is in US dollars and is shown before you pay. Where the law requires us to charge sales tax or VAT, it's shown at checkout before you pay. Your card statement may show the charge under a different name from Chalk's; your receipt email from Stripe confirms it.

Refunds

If Chalk isn't for you, ask within 14 days of buying and we'll refund you in full, even though you've already downloaded it. See the refund policy. When we refund a purchase, its license key can no longer download, install or update Chalk. A copy already installed keeps working.

Updates and support

We aim to keep Chalk working with current versions of macOS and Claude Code and to answer support email within a few working days, but we can't promise that every future version of either will work with Chalk. Downloads and updates come from our download service, which checks your license key.

No warranty

Chalk is provided "as is". As far as the law allows, we make no promises beyond those in these terms, including that Chalk will be uninterrupted or free of bugs. Keep your own backups of anything important.

Limits on liability

As far as the law allows, we aren't liable for indirect or consequential losses, and our total liability to you is limited to what you paid for Chalk. Nothing in these terms limits rights you have under consumer law that can't be limited.

Ending these terms

If you break these terms, for example by sharing your license key, we may end your license and block the key. You can stop using Chalk at any time; chalk uninstall-claude removes it from Claude Code.

Changes

We may update these terms. The version that applies is the one in effect when you bought Chalk, unless you agree to a newer one.

Law

These terms are governed by the laws of Nigeria, and disputes go to the courts of Lagos State. If you're a consumer, you also keep the protection of the laws where you live, and can bring a claim in your local courts. Before going to court, please write to us first; most problems can be fixed by email.