Comparison

Plusm 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

Plusm

Features
Read full description

Plusm is a notepad-style calculator that lets you type the way you think. No buttons. No formulas. Just type plain text and see results instantly — right next to each line. CALCULATE NATURALLY Write math like you would on paper. Mix numbers, labels, and notes freely: Rent: $1,450 Groceries: 320 + 45.50 Total: $1,450 + 365.50 CONVERT ANYTHING Currencies, units, and more — just type it: 250 USD to EUR 5.8 feet to cm 72°F to °C 0.5 BTC to USD WORK WITH DATES today + 90 days March 1 - January 15 USE VARIABLES price = 299 price + 8.5% AND MORE now in Tokyo sqrt(144), sin(45) 0xFF, 0b1010 ORGANIZE WITH PAGES Keep separate calculations in named pages — monthly budget, trip planning, work hours. Everything saves automatically. MENU BAR MODE Access Plusm from your menu bar with one click. Quick calculations without leaving what you're doing. BUILT FOR YOU Native app. Dark mode. Keyboard-first. Fast and lightweight. Plusm Pro unlocks unlimited pages, currency & crypto conversion, and menu bar mode. Free version includes full math, unit conversion, and three pages. Terms of Use: https://plusm.app/terms EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sigma Notepad Calculator

Features
Read full description

$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

Screenshots

Plusm3 screens
Sigma Notepad Calculator4 screens

Verdict

The call

The clearest difference is update cadence: Sigma Notepad Calculator at fortnightly against Plusm's every 5 months. On price, ads, in-app purchases 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. Plusm sells 3 in-app purchases, starting at $2.99 per month and Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Plusm ships an update every 5 months, Sigma Notepad Calculator fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 5 level
Plusm versus Sigma Notepad Calculator: the parameters behind the verdict, then further details
ParameterPlusmSigma Notepad Calculator
PriceFreeFree
Update frequencyEvery 5 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Mac — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size4 MB19 MB
Age rating4+4+
DeveloperEgor SigaevSoules Studio Ltd

In-app purchases

3 purchases

Plusm

Subscriptions2
  • Plusm Pro Monthly7 Days trial$2.991 Month
  • Plusm Pro Yearly7 Days trial$17.991 Year
One-time1
  • Plusm Pro Lifetime$24.99
3 purchases

Sigma Notepad Calculator

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

Questions

Is Plusm free?
Plusm is free to download, with in-app purchases available.
Is Sigma Notepad Calculator free?
Sigma Notepad Calculator is free to download, with in-app purchases available.
Do Plusm or Sigma Notepad Calculator have ads?
Neither Plusm nor Sigma Notepad Calculator shows ads.
Which is updated more often, Plusm or Sigma Notepad Calculator?
Plusm ships an update every 5 months, and Sigma Notepad Calculator fortnightly. Most recently, Plusm was updated on October 31, 2026 and Sigma Notepad Calculator on November 5, 2026.

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