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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Folders Your notes have somewhere to go. däpter opens on a folder list now: All Notes at the top, then yours, each row carrying a count of what's inside. Tap one to see just those notes. Make a folder, rename it, or delete it with a swipe. Move a note in from the swipe menu on any note row, or from the editor's own menu. A note you start inside a folder belongs to it from the first keystroke. Search still searches everything, wherever you are. Deleting a folder asks first, and the notes inside keep their 30 days in Recently Deleted rather than going with it. Quick note Tap the däpter logo for a scratch pad that's always there. It does the math as you type like any other note, but there's no title, no row in your list and nothing to clean up. Whatever you leave in it is waiting next time. Also new Folders sync over iCloud alongside your notes, so the ones you made on your iPhone show up on your iPad. Needs däpter Plus. The welcome tour is one screen that moves with you instead of five that flick past.

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, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • 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 $4.99
    • Dapter Plus Monthly $0.99
    • Dapter Plus Lifetime $9.99
    Copyright
    • © 2026 shy studio