dapter: Notes That Do Math

Notepad calculator, offline

Only for iPhone

Free · In-App Purchases

iPhone

Write 200 usd in eur on any line and watch it resolve. A notes app with a real calculation engine inside. No account, nothing to sign up for. Apple Notes, if it could do math. Type rate = 45 on one line and rate × hours on the next, and the answer appears in the margin as you type. Every line that looks like a calculation resolves instantly. Everything else stays prose. No account. No servers of ours. Nothing to sign up for. WRITE MATH LIKE A SENTENCE • 20% of 300, 200 - 10% — percentages, markups and discounts the way you'd say them • 100 usd in eur, $50 + 20% — live currency rates, formatted as money • 10 km + 5 m in miles, 6 m / 2 s → 3 m/s — real unit algebra, not string replacement • today + 21 days, 3 days + 12 hours — dates and durations that count themselves A NOTE THAT ADDS ITSELF UP • Name a value and reuse it: rate = 45, then rate × hours three lines later • sum a block for budgets, receipts, invoices and quick tallies • round, sqrt, pi and the rest, for when a note needs to be a little smarter STILL A REAL NOTES APP Folders, pinned notes, search, a home-screen widget, Recently Deleted, and a quick scratch pad one tap from anywhere. Light and dark themes. Available in English, Russian and Kazakh — and the calculator understands all three, because the parser does, not just the interface. PRIVATE BECAUSE OF HOW IT'S BUILT Every calculation runs on your device. Your notes live in local storage on your iPhone, not in an account with us. All the math, unit conversion and currency work is free, forever — there is no calculation behind the paywall. BUILT FOR Freelance quotes and invoices. Monthly budgets. Travel money. Recipe scaling. Any moment you'd reach for a calculator and then forget what the numbers were for. DÄPTER PLUS Unlimited notebooks, and iCloud sync across your iPhones through your own Apple account. Monthly, yearly, or a one-time lifetime unlock — pay once and you're done. Plus is what keeps däpter independent: no ads, no investors, no data sold. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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same app, same features, slightly changed the pricing model. love.

The developer, Anuar Shaidenov, 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.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

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    Provider
    • Anuar Shaidenov
    Size
    • 68.1 MB
    Category
    • Productivity
    Compatibility
    Requires iOS 16.4 or later.
    • iPhone
      Requires iOS 16.4 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 2 more
    • English, Kazakh, Russian
    Age Rating
    4+
    In-App Purchases
    Yes
    • Dapter Plus Yearly S$ 6.98
    • Dapter Plus Monthly S$ 0.98
    • Dapter Plus Lifetime S$ 14.98
    Copyright
    • © 2026 shy studio