Sigma Notepad Calculator vs Kolada
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sigma Notepad Calculator
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$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 whatβs 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 whatβs paid and the total shows whatβs 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 noteβs 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 youβd 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 doesnβt. 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
Kolada
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Open Kolada and start typing. Your note is already there. Your notes are plain Markdown files in a folder you choose, so they stay yours and open in any other app. No account, no sign-in, no tracking. Quiet, but capable: - Live Markdown: headings, lists, quotes and highlights appear as you type. - Checklists, tables and links between notes. - Today: tasks with a date, gathered from every note. - Search every note in a moment. - Light and dark, with full right-to-left support. Your devices, together: - Pair your iPhone, iPad, Mac, Windows or Linux computer once, with a code. No account. - Sync: your notes stay the same on every device you pair. - Beam: send text, links, passwords and pictures to your other devices in a second. - Share to Kolada from any app. - End-to-end encrypted: only your devices can read what you send. Fast, calm, and yours.
Screenshots
Verdict
The clearest difference is in-app purchases: Kolada at none against Sigma Notepad Calculator's 3. Kolada also leads on update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. Kolada asks for nothing beyond the download.
Sigma Notepad Calculator ships an update fortnightly, Kolada every 2 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.
| Parameter | Sigma Notepad Calculator | Kolada |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 2 days β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 17.0 | 17.0 |
| Further details β not scored | ||
| Size | 19 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Soules Studio Ltd | Mahmoud Khaled Younis Mahmoud Hamed |
In-app purchases
Sigma Notepad Calculator
- Monthly$1.991 Month
- Annual7 Days trial$14.991 Year
- Lifetime$29.99
Kolada
No in-app purchases





