Terms of Use

1. The app

Numvolt is a mental arithmetic training app published by Roméo Gambino. It is free to download, with no account or advertising. For new installations, Numvolt Pro is required after the welcome. A local profile that had already completed the welcome or answered a question before version 0.2.13 keeps access on that device. Pro is available through an auto-renewing yearly subscription or a one-time lifetime in-app purchase. Current prices and any eligible trial are shown in the app before purchase. The yearly subscription renews unless you cancel it in your Apple Account settings; deleting the app does not cancel it. The lifetime purchase does not renew. Apple's standard end-user licence agreement applies to the download.

2. The ladder

Joining the ladder is optional. By joining, you agree that your nickname, city and best sprint scores are published to other users, as described in the privacy policy. You agree to choose a nickname that is not offensive, does not impersonate someone, and does not contain personal data such as a phone number or an address. We may remove any record that breaks these rules, without notice.

Scores are ranked as sent by the app. Numvolt has no server-side anti-cheat beyond a plausibility limit; the ladder is a game between people who play fairly, not a certified competition, and gives no right to any prize.

3. Educational content

Questions, tips and corrections are generated by the app and checked by an independent program. They are provided for training purposes; Numvolt is not a school curriculum and does not replace a teacher.

4. Availability

The app may be updated, and the ladder depends on Apple's iCloud service. We do not guarantee uninterrupted availability of the ladder and may stop it in a future version.

5. Liability

The app is provided “as is”. To the extent permitted by law, we are not liable for indirect damages arising from its use. Nothing in these terms limits rights you have as a consumer under applicable law.

6. Contact

Gambinoromeo9@gmail.com