Calculator² vs Plusm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator²
This app offers a suite of specialized calculators, including scientific, financial, programmer, and basic functions. It also features a currency converter and a comprehensive unit converter for various needs.
- Scientific calculator with advanced functions
- Financial calculator for loan and tax calculations
- Programmer calculator for number base conversions
- Currency converter with real-time rates
- Unit converter for over 200 units
- Basic calculator for everyday use
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The smart calculator for iOS. Scientific Calculator An advanced calculator with a comprehensive set of mathematical functions including trigonometric, hyperbolic, logarithmic, exponential, factorial, combination and permutation. Over 125 mathematical and physical constants are accessible in an easy-to-navigate list. Implicit multiplication and operator precedence are supported for faster input, while the unique memory mode also provides a facility for statistical functions. Financial Calculator* A calculator with a variety of functions for performing financial calculations, such as determining the monthly payments on a loan or the price of an item after tax has been applied. Individual rates can be set for markup, discount, tax and interest. Perfect for students and professionals who wish to verify the results of time value of money calculations. Programmer Calculator A powerful tool for conversions between decimal, hexadecimal, octal and binary number bases, with a unique view for entering ASCII keys. Bitwise operations including AND, OR, XOR and NOT are available, in addition to functions not usually found in a programmer calculator, such as square and factorial. Basic Calculator A simple, easy-to-use calculator for quick, everyday calculations. Currency Converter* A currency calculator providing accurate conversions between 150+ World currencies. The exchange rates are easily updated to real-time values from the Open Exchange Rates API, while favourite currency conversions can be saved for easy comparisons. Unit Converter A comprehensive unit converter with over 200 units across 26 categories, including temperature, fuel consumption, viscosity, radiation and more. * The Financial Calculator and Currency Converter are unlocked by an in-app purchase
Plusm
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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/
Screenshots
Verdict
The clearest difference is iOS requirement: Calculator² at 9.0 against Plusm's 18.0. On price, update cadence, ads and in-app purchases 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
Both are free to download. Calculator² sells 3 one-off in-app purchases and Plusm sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Calculator² ships an update every 3 months, Plusm every 5 months. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.
| Parameter | Calculator² | Plusm |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, Mac |
| Requires iOS | 9.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 78 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Walters | Egor Sigaev |
In-app purchases
Calculator²
- Financial Calculator$0.99
- Currency Converter$0.99
- Calculator² Premium$1.99
Plusm
- Plusm Pro Monthly7 Days trial$2.991 Month
- Plusm Pro Yearly7 Days trial$17.991 Year
- Plusm Pro Lifetime$24.99









