Terms of Use

Last updated: 25 October 2026

The basics

Calculoco is provided under Apple's Standard End User License Agreement, together with the points below. Calculoco is made by Martin Šlechta, Czech Republic (hello@calculoco.com).

Free and Pro

Numbers 0 to 99 are free in every language, with no time limit. Calculoco Pro unlocks the rest of the courses (hundreds to millions, prices, times, dates, decimals and more), Sprint beyond 99, the option to turn off the daily lesson limit, widgets and the Apple Watch app.

Subscriptions and purchases

• Pro is available as a yearly or monthly subscription, or as a one-time lifetime purchase. Prices are shown in the app in your local currency before you buy.
• Payment is charged to your Apple Account when you confirm the purchase.
• Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends.
• If a free trial is offered, it turns into a paid subscription when it ends unless you cancel at least 24 hours before. Any unused trial time ends when you subscribe.
• You can manage or cancel subscriptions in your Apple Account settings (Settings → your name → Subscriptions).
• Refunds are handled by Apple at reportaproblem.apple.com.
• Pro purchases can be shared with your family through Family Sharing.

Learning content

We work hard to make every number, word and pronunciation right, but language varies by region and mistakes can happen. If you spot one, tell us and we'll fix it. Calculoco is a learning tool: please double-check important numbers (prices, appointments, medication) yourself.

Fair use

Please don't copy, resell or reverse-engineer the app or its content.

Changes and law

We may update these terms; the date above shows the latest version. These terms are governed by Czech law, without limiting any rights you have under the consumer law of your country.