Terms of Use — Arcana: Mental Math Tricks

Last updated: October 18, 2026

Arcana (“the app”) is published by Almas Apps LLC (“we”, “us”). These terms cover using the app and buying Arcana Pro. Using the app means you accept them. They are written to be read; where a term exists to protect us rather than you, it says so.

The licence

The app is licensed, not sold, to you under Apple's Licensed Application End User License Agreement (the “Standard EULA”). These terms add to it; where the two conflict, the Standard EULA wins. You may use the app on any Apple device you own or control, as the App Store's usage rules allow.

What the app is

A course in mental calculation: techniques (“spells”) taught one at a time, practised with generated problems, and brought back for review on a schedule. It works offline and needs no account. Your progress is stored only on your device; the Privacy Policy has the detail and is part of these terms.

Arcana Pro

• What's free: the Initiate and Novice realms, the first three Everyday spells, and reviews and speed duels for everything you have learned.
• What Pro adds: the Apprentice to Mathemagician realms, their rank trials, and the rest of the Everyday and Estimation tracks.
• Yearly: an auto-renewable subscription, billed yearly to your Apple Account. Eligible new subscribers get a 7-day free trial; if you don't cancel at least 24 hours before the trial ends, the yearly price is charged. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before that end. Manage or cancel it in Settings → Apple Account → Subscriptions. Cancelling stops the next renewal; the current period continues to its end.
• Lifetime: a one-time purchase that unlocks the same things with no renewal.
• Family Sharing: both can be shared with up to five family members through Apple's Family Sharing.
• Prices are shown in the app and the App Store before you buy, in your local currency, and may differ by country. Any price change applies only from your next renewal, after Apple notifies you as its rules require.
• Refunds are handled by Apple under its policies. We can't issue them ourselves; request one at reportaproblem.apple.com.
• Restore: purchases follow your Apple Account. Use “Restore” on the Arcana Pro screen or in Settings on a new device.

Your progress

Because your progress lives only on your device, keeping it is your responsibility. We have no copy and cannot restore it if your device is lost or wiped without a backup. Arcana Pro itself is never lost: it is tied to your Apple Account and restores at any time.

Accuracy

We test the app's problems and worked examples carefully, but it is a learning tool, not a calculator of record. Estimation and conversion spells teach approximations on purpose. Don't rely on the app for financial, tax, medical or other decisions where an exact figure matters.

Fair use

Don't reverse engineer, resell or redistribute the app, or try to unlock paid content without paying for it. Everything in the app, including its course, text and artwork, belongs to Almas Apps LLC.

Liability (this one protects us)

The app is provided “as is”. To the extent the law allows, we are not liable for indirect or consequential losses from using it, and our total liability is limited to what you paid for Arcana Pro in the 12 months before the claim. Nothing here limits rights you have under consumer law that can't be excluded.

Changes

We may update these terms as the app changes. We will update this page and its date; the version in force when you buy applies to that purchase.

Contact

Email almasappsllc@gmail.com.