Sumi Get SumiFree Sumi is a notepad calculator for iPhone, iPad and Mac. Type a line, get the answer beside it. Money, units, time and dates included.
free · no account offline rates
Every result below comes from Sumi's own engine, the one inside the app, using its built-in exchange rates.
A screen recording from the iPhone app, 38 seconds, no sound.
Every unit and currency with live rates, unlimited lines, 3 sheets. No account.
Unlimited sheets, iCloud sync, all 6 themes, every widget, pins and share as image.
Or stay free. Nothing is deleted: sheets past the first 3 turn read-only.
Sumi is a notepad calculator for iPhone, iPad and Mac. Each line you write is calculated and the answer shows beside it. Name a value, like rent = 2450 EUR, use it on later lines, and change one number to update the rest. It is also a currency converter and unit converter: write 100 USD in EUR or 5 km in miles.
Like Soulver and Numi, Sumi is a notepad calculator: you write plain lines and each one shows its answer. Sumi is made for iPhone first and works offline, with about 160 currencies and 20 cryptocurrencies, a bill splitter that tracks who has paid, and Home Screen and Lock Screen widgets. Sumi Pro is a single $7.99 purchase in the US, with no subscription.
Yes. Every calculation runs on your device. Currency conversion uses live exchange rates when you are online, for free, and built-in rates when there is no connection.
About 160 world currencies, including USD, EUR, GBP, JPY, IDR, SGD, INR and AUD, and about 20 cryptocurrencies such as Bitcoin and Ether, plus weight, length, volume, area, speed, angles, temperature, data and energy. It also handles time and dates, like 7h 30min × 5 or days until 25 dec, time zones, like 2:30 pm HKT in Berlin, math like sqrt 16, 2 ^ 10 or 255 in hex, and Indonesian amounts like 150rb and 2jt.
Yes. Write a line like dinner / 4, tap the answer and choose Split 4 ways. Name each person, tick off who has paid, or change one share and the others adjust to keep the total. Sharing the split as text is free; sharing it as an image is part of Sumi Pro.
Sumi is free with up to 3 sheets, live exchange rates, two themes (Cream and Espresso) and one small widget. Sumi Pro is a one-time purchase of $7.99 in the US, with a 7-day free trial and Family Sharing. It adds unlimited sheets, iCloud sync between your iPhone, iPad and Mac, four Catppuccin themes (Latte, Frappé, Macchiato and Mocha), every widget size, pinning, sharing sheets as images and app icons. One purchase works on all of them. There is no subscription.
Your sheets are stored on your device. If you turn on iCloud sync (Sumi Pro, off by default), they also go to your own private iCloud account, which we cannot read. Sumi has no account, no ads and no analytics, and nothing you write is sent to us.
iPhone with iOS 17 or later, iPad with iPadOS 17 or later, and Mac with macOS 15 or later. It is a free download on the App Store, and Sumi Pro bought on one works on the others.
