Sigma Notepad Calculator vs Numerus

$610 left this month, before rent went out, and you never typed a sum. Sigma is a notepad that does the math while you write: every line shows its answer, and the total stays in view above the keyboard. Know what’s left before you spend it. Write "pay = $2400", then your bills, "rent: $1200" and "food: $380", and "left = pay - total" shows $820. Rent goes up? Change one number and everything below follows. Split the bill at the table. Dinner for four, tip included, comes to $51.75 each before anyone reaches for a card. Then send the whole note to the group chat as one image, every line and the total included. Know what the trip costs before you book. Flights in dollars, the hotel in euros, the train in Swiss francs: one total, all in, in your own currency. Rates stay live and keep working offline. Never add up the same list twice. Tick what’s paid and the total shows what’s still to pay. Give each part of a list a heading and each part gets its own total. Your totals, without opening a note. Ask Siri for your Groceries total in Sigma, keep a note’s total on your Home Screen with the free widget, and set a reminder on a date in your note. And all the everyday math around it. How many days until an invoice is due. Whether a 220 cm sofa fits an 8 ft wall. What you really saved at the sale. What a week of freelance work comes to. Percentages, units, dates and currencies, written the way you’d say them, with square roots, hex and trigonometry when you need them. Every line answers as you type. No formulas, no grid, and one rule to learn: a colon counts, an equals sign doesn’t. Free: three notes and the full calculator. No ads, no time limit. Sigma Pro keeps every month: unlimited notes, iCloud sync, export to PDF, Markdown and plain text, and five more themes. Sigma Pro is a single payment or monthly. Your notes stay on your iPhone, and iCloud sync uses your own private iCloud database, never our servers. Works in English and French. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getsigma.app/privacy

Numerus is a calculation notebook: write expressions and see results beside each line. Keep the notes and reasoning that give your numbers context. CALCULATE AS YOU WRITE Use arithmetic, percentages, variables, functions, dates and unit conversions. Continue with previous results and summarize lists with aggregates. ORGANIZE YOUR THINKING Create pages, rename them, duplicate examples and find your work with search, tags and favorites. Explore the example library without leaving the app. SHARE AND KEEP YOUR WORK Export pages as PDF or editable .numerus files. Import pages and save a workspace backup. Page files can also be opened in Numerus desktop. WORK AT YOUR OWN PACE Local calculations work offline. Currency conversions use Frankfurter reference rates when connected and saved rates when available; they are not real-time market quotes. NO ACCOUNT REQUIRED There is no registration, advertising or in-app analytics. Pages are stored on your device, and you choose when to export them. System backups depend on your device settings. English and Spanish interface and examples, light and dark themes, and layouts that adapt to phones and tablets. BUILT TO USE AND SHARE Numerus began at Viento Digital as a tool for our own everyday calculations. We share it for free, without subscriptions or in-app purchases.