Calculator Tools vs GitHub Spark

The short answer

Calculator Tools hosts a public static web app on your account at calculator.tools. There is no required GitHub login. GitHub Spark is GitHub's AI offering for building small apps in GitHub's environment.

Use Calculator Tools when you want a public tool on this host. Open Create or connect MCP. Use Spark when you want the result next to GitHub.

What they do

GitHub Spark is aimed at natural-language app creation inside GitHub's product. The natural home is GitHub accounts, repos, and GitHub's runtime choices.

This page does not list Spark pricing or feature flags. Those change on GitHub's site. The comparison is about what each product is for.

What Calculator Tools does

Calculator Tools publishes a hosted app from Create, remix, GPTs, or MCP. There is no required GitHub login.

Files live in one directory. Typical files are index.html plus CSS, JavaScript, JSON, SVG, or similar static files.

Browse lists public apps on this site. Remix copies one onto your account.

Free accounts can publish 3 apps. Pro ($5.99/month) raises the limit to 25.

Where they differ

Feature	GitHub Spark	Calculator Tools
Home	GitHub	calculator.tools
Git/repo native	Yes	No
Public URL on this host	No	Yes
ChatGPT official GPTs for this host	No	Yes
MCP into this host	Not this product	Yes

Spark stays in GitHub accounts and repos. Calculator Tools hosts a public static tool on your account, with no required GitHub login.

When to use each

Use Calculator Tools for a hosted calculator, tracker, or game with a link you can send. Open Create.
Use MCP if you already work in Cursor or Claude and want that assistant to publish here. See Cursor.
Use GitHub Spark when the app should stay in GitHub's product.
Use Cursor if you want a local editor against a repo, then publish the hosted files here.
Use v0 or Bolt for a modern frontend project you will still put on GitHub later. For a static widget, use Calculator Tools.

Limits

Calculator Tools is not GitHub. It does not provide issues, PRs, or Actions.

Spark is not this site's remix gallery.

Treat generated apps as drafts. Review them.

Next step

Open Create and publish a hosted app, or connect MCP. The first 3 apps are free.

Sources

Ready to publish a public app you own?

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