Jotsum is a calculator you write in plain words. Type your math and notes on the left; the answers appear on the right, live, as you type — no equals key, no buttons, no fuss.
It’s the everyday calculations you actually do: splitting a bill, converting currencies at today’s rate, working out a percentage off, adding up a trip budget, or checking how many days until a deadline. Name your values and reuse them down the page, and Jotsum keeps the whole sheet in sync.
SYNCS WITH YOUR MAC
Your calculations sync over iCloud, so the sheet you start on your Mac is on your iPhone — and the other way around. No account, no sign-in; it uses your own iCloud.
WHAT IT DOES
• Plain-language math with variables — name a number, reuse it anywhere
• Live currency conversion (160+ currencies + Bitcoin/Ethereum, no API key, no login)
• Units — length, mass, time, volume, data, temperature, area, speed
• Percentages done the human way — “20% off 80”, “12 is what % of 60”
• Dates & durations — “3 days + 5 hours”, “days until christmas”, time zones
• Scientific functions — sqrt, sin/cos/tan, logs, exp, powers, plus pi, e, tau
• Finance — compound interest and mortgage payments
• Multiple notes, organised in a tidy list
PRIVATE BY DESIGN
Everything stays on your devices and your own iCloud. No account, no analytics, no tracking. Currency rates are the only network request, and the app works offline too.
Light and dark, with a warm editorial look that’s easy on the eyes all day.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Carry on from the answer above. Press Return, type +, −, ×, ÷, ^ or %, and the new line starts with the answer above as a live value that follows that line. Backspace right after gives you the plain sign back, for a line that starts with −5.
Also: on iPhone and iPad, references to other lines now show their value, like on the Mac, and on the Mac typing // now starts a comment.
Version 1.6.1
The developer, Hrvoje Matosic, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More