Napkin – Notes & Calc

Napkin is a notes app that calculates, on iPhone, iPad and Mac.

Write a line, end it with =>, and the result appears behind the arrow. Change a number above it and every result below updates as you type.

CALCULATE IN YOUR NOTES • Variables, including names with spaces: rent = 1100, per day = left / 30 => • Your own functions: f(x) = x^2 + 1, then f(4) => • Units and conversions: 26.2 miles in km =>, 50 km/h * 30 min => • Unknown names stay symbolic: 2 * y + 3 * 4 => 2y + 12

EQUATIONS • 6x = 30, then x => 5 – the unknown is solved and defined • Units too: speed * 2 h = 100 km => speed = 50 km/h • Systems: x + y = 10 and x - y = 2 give x = 6, y = 4 • Comments after # stay out of the calculation

MARKDOWN, STYLED AS YOU WRITE • Headings, bold, italic, code and quotes are styled in the editor • Bold, italic and links from the menu over a selection, or ⌘B, ⌘I, ⌘K on a keyboard • [[Links]] between notes, and tappable web addresses

FAST NOTES • One field to search and to create: type, press Return, and you are writing • The words you searched for are marked in the note; find in a note with the find bar • Hide notes you rarely need; a search still finds them

YOUR FILES, ON ALL YOUR DEVICES • Every note is a plain Markdown file in a folder you choose, for example in iCloud Drive • Pick the same folder on your iPhone, iPad and Mac, and your notes are everywhere • A note changed on two devices at once is kept twice, never overwritten • Buy once: Napkin for Mac, iPhone and iPad is one purchase

Napkin collects no data and makes no connections of its own.

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