Comparison

FastCalc lite vs Sigma Notepad Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FastCalc lite

This calculator app offers a streamlined experience with large, easy-to-use keys and a permanent display of your calculations. It automatically shows results as you type, eliminating the need for an equals button.

Highlights
  • Large, easy-to-read keys
  • Permanent expression display
  • Automatic result display
  • Gesture-based interface
  • Integrated help videos
Read full description

FastCalc lite is a calculator recognized for its efficiency and ease of use. It stands out thanks to: • its large keys, which allow for fast and accurate input, • the permanent display of the expression entered by the user, • the automatic display of the result while typing: no “=” key required! FastCalc lite is thus a simple and efficient calculator, ideal for everyday calculations. BASICS OF USE The interface of FastCalc lite is innovative and minimalist, entirely based on simple gestures: • Select a side symbol on a key: slide your finger in its direction. • Delete the last entered elements: make a small swipe to the left on the display. • Clear the entire expression: swipe quickly to the left across the whole display. FEATURES • Large, practical, and easy-to-read keys. • Permanent display of the current expression. • Integrated help videos and user guide (in ⓘ).

About

Sigma Notepad Calculator

Features
Read full description

Write your bills, a trip or a dinner to split as a note. Every line shows its result as you type. Your monthly bills, the way you think about them: "rent: 1200", "food: 380", "transport: 95", then "rent + food + transport" shows 1675. Change the rent and every line that uses it updates. No equals sign, no formulas, no grid. Splitting dinner? Write "dinner: 240", "tip: 15% of dinner", then "(dinner + tip) / 4" for each share. Planning a trip? "hotel: $85 times 3", "flights: $420", then "hotel + flights". Free with three sheets and the full calculator. No ads, no time limit. Sigma Pro unlocks unlimited sheets, export, iCloud sync, and five more themes, billed yearly, monthly, or once for life. New subscribers get a 7-day free trial on the yearly plan. Highlights: - Money notes. Bills, trips, shared costs and quick estimates, written as plain lines with a result beside each one. - Named values. Name a number once and use it on any line below. Change it and every line that uses it updates. - Natural language arithmetic. Operators read like English: times, plus, of. Percentages, averages, units, and dates work the way you write them. - Currency. Live rates with offline cache. When rates are out of date, a dot appears on the line; tap it to see when they were 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. - For the technical side: hex, square roots, and trigonometry are there too. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getsigma.app/privacy

Screenshots

FastCalc lite2 screens
Sigma Notepad Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: FastCalc lite at none against Sigma Notepad Calculator's 3. Sigma Notepad Calculator's advantage is update cadence (every 4 weeks vs every 5 months) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. FastCalc lite asks for nothing beyond the download.

UpkeepUpdate frequency

FastCalc lite ships an update every 5 months, Sigma Notepad Calculator every 4 weeks. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
FastCalc lite versus Sigma Notepad Calculator: the parameters behind the verdict, then further details
ParameterFastCalc liteSigma Notepad Calculator
PriceFreeFree
Rating3.8 (15 ratings) — better—
Positive reviews73.3% of reviews—
Number of ratings15 — better—
Update frequencyEvery 5 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.017.0 — better
Further details — not scored
Size9 MB15 MB
Age rating4+4+
DeveloperAndre PonzoSoules Studio Ltd

In-app purchases

None

FastCalc lite

No in-app purchases

3 purchases

Sigma Notepad Calculator

Subscriptions2
  • Monthly$1.991 Month
  • Annual7 Days trial$14.991 Year
One-time1
  • Lifetime$29.99

Questions

Is FastCalc lite free?
FastCalc lite is free to download, with no in-app purchases.
Is Sigma Notepad Calculator free?
Sigma Notepad Calculator is free to download, with in-app purchases available.
Do FastCalc lite or Sigma Notepad Calculator have ads?
Neither FastCalc lite nor Sigma Notepad Calculator shows ads.
Which is updated more often, FastCalc lite or Sigma Notepad Calculator?
FastCalc lite ships an update every 5 months, and Sigma Notepad Calculator every 4 weeks. Most recently, FastCalc lite was updated on October 19, 2026 and Sigma Notepad Calculator on October 8, 2026.

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