Sigma Notepad Calculator
Math in words: units, currency
Only for iPhone
Free · In‑App Purchases
iPhone
Spreadsheets are overkill. A calculator forgets your work. Sigma keeps the math, the labels, and the thinking in one place.
Type your math. Sigma calculates as you write. A notepad where every line is a working calculation.
Type "rent 1200, food 380, transport 95" and Sigma adds them. Write "20% of 240" and the answer appears beside the line. Name a value, reference it three lines down, and every dependent answer updates when you change the source.
Free forever for everyday use: three sheets, full calculator, no ads. Upgrade to Sigma Pro yearly, monthly, or once-for-life when you need unlimited sheets, export, and iCloud sync.
Highlights:
- Natural language arithmetic. Operators read like English. Percentages, totals, averages, and units all work the way you write them.
- Named variables. Declare once, reference everywhere. Changes propagate.
- Currency. Live rates with offline cache. Tap a line to see when rates were last fetched.
- Themes. Six themes including a high-contrast option. The default follows your system light and dark; five more unlock with Sigma Pro.
- Sheets. Up to three sheets on the free tier. Sigma Pro unlocks unlimited sheets, export to PDF, Markdown, and plain text, plus iCloud sync across your devices.
- Private by default. Sheets stay on your device. iCloud sync uses your private database, never our servers.
- Designed for iOS first. Reads French and English natively. No web app, no ads, no surprise pop-ups.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://getsigma.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Soules Studio Ltd, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Soules Studio LTD
- Size
- 15.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
- English and French
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $29.99
- Annual $14.99
- Monthly $1.99
- Copyright
- © 2026 Soules Studio Ltd
