Arcana: Mental Math Tricks
Speed math, one spell a day
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Learn the tricks human calculators use: 53 × 11 in a second, 65² in two, the day of the week for any date. One spell at a time, then reviews so you keep it.
Arcana teaches mental math the way a good language app teaches a language: one technique at a time, practised until it's fast, and brought back just before you'd forget it.
Every technique is a spell. Multiply any number by 11 in your head. Square 65 in two seconds. Work out a 15% tip before the waiter comes back. Name the day of the week for any date in history. Each spell starts with a short explanation and a worked example, then a drill that adapts to you, so every problem is just hard enough.
FROM TIMES TABLES TO MATHEMAGIC
Eight ranked realms, 58 spells in one continuous ladder:
• Initiate: number bonds, adding through ten, and the times tables with a trick for each
• Novice: × 11, squares ending in 5, left-to-right adding and subtracting, × 25
• Apprentice: 2-digit × 1-digit, numbers near 100, the teens
• Scribe: the Trachtenberg digit rules for × 3 to × 12, and checking answers by casting out nines and elevens
• Alchemist: squaring any 2-digit number, the criss-cross method, factoring
• Oracle: dividing in your head, fractions, and the cycle of the sevenths
• Sorcerer: 3-digit × 2-digit, cubes, and squares of up to five digits
• Mathemagician: the day of the week for any date, cube roots and square roots on demand
Plus two side tracks: Everyday (percentages, tips, discounts, sales tax, the rule of 72) and Estimation.
BUILT TO STICK
• Spaced repetition decides when each spell comes back, so you keep what you learn without cramming.
• Grades come from your answers and your speed. Nobody self-rates.
• Miss one and you see the trick worked step by step on that exact problem.
• Rank trials at the end of each realm. Already know your tables? Test out and skip ahead.
• Speed duels: 60 seconds against your own best.
• A daily goal, a streak, and streak freezes that forgive a missed day.
PRIVATE AND OFFLINE
No account, no ads, no tracking. Everything stays on your iPhone and works without a connection.
ARCANA PRO
Initiate and Novice, the first three Everyday spells, and reviews and duels for everything you've learned are free, for good. Arcana Pro opens the other six realms, every rank trial and both side tracks. Family Sharing is included.
• Yearly: $24.99 a year, with a 7-day free trial for new subscribers
• Lifetime: $49.99, once
Prices are in US dollars and vary by country. Payment is charged to your Apple Account at confirmation of purchase, or when the free trial ends. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the end of the period. Manage or cancel it any time in your Apple Account settings.
Terms of Use: https://almasappsllc.github.io/arcana-terms.html
Privacy Policy: https://almasappsllc.github.io/arcana-privacy.html
Ratings & Reviews
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The developer, MOHAMMAD HASSAN GARSHASB, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MOHAMMAD HASSAN GARSHASB
- Size
- 1.9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Arcana Pro (Lifetime) $49.99
- Arcana Pro (Yearly) $24.99
- Copyright
- © 2026 Almas Apps LLC
