Get in touch

Found a bug? If a calculation looks wrong, a step is missing, or something is broken on your device — please let us know. Include the numbers you used and we'll fix it.

Got a tool idea? If there's an operation you'd love to see animated — fractions, percentages, long division with decimals, anything — send it our way. We're genuinely building based on what's useful.

Wrong in your language? If something reads awkwardly or incorrectly in the Spanish, Italian, or Portuguese versions, I want to know — native speaker corrections are very welcome.

Just saying hello? That's fine too. If the tools helped your kid finally understand carries, or made homework a little less painful, I'd love to hear it.