Comparison

CMCalc vs Calculator 4.0

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

Head to head
About

CMCalc

This app emulates a classic 1980s computer math calculator, offering decimal arithmetic, binary conversions, and logic functions. It supports parentheses for complex calculations and includes modern features like copy/paste and landscape mode.

Highlights
  • Decimal arithmetic
  • Binary conversions (decimal, binary, octal, hexadecimal)
  • Binary logic functions
  • Operator grouping with parentheses
  • Hexadecimal input (A-F)
  • Copy and paste results/functions
  • Landscape mode
Features
Read full description

The CMCalc application is a replica of the Casio CM-100 Computer Math Calc solar powered calculator that was sold in the mid 1980’s. It performs simple decimal arithmetic and basic binary conversions (decimal - binary - octal - hexadecimal) and binary logic functions. While it is a standard infix calculator, it supports operator grouping with parentheses. For hexadecimal calculations, the input keys include A through F. CMCalc application performs all the same functions as the calculator, and has the same look as the original. There are a couple features that were not conceivable in the 1980’s on a calculator … such as the ability to copy and paste the results or the entered function, and a landscape mode for devices with 4 inch or larger screens. The face of the calculator can be viewed in two modes including a traditional application style, and a photo replica of the original calculator face.

About

Calculator 4.0

Perform daily calculations with a clean interface and large buttons. Features include decimal support, a calculation log, and two themes. Regular updates ensure continuous improvement and new functionalities.

Highlights
  • Intuitive interface with large buttons
  • Backspace key for corrections
  • Decimal point or comma support
  • Calculation display log
  • Two customizable themes
  • Regular updates with new features
Features
Read full description

Do the math with Calculator 4.0. Our calculator app features a sleek and intuitive interface, with large buttons and a clear display for easy input and output. Plus, with the backspace key you can correct or change numbers. Other features of our calculator app include support for decimal point or decimal comma, a display log for your calculation, and two themes to choose from!. And with regular updates and new features being added all the time, our calculator app is always improving and getting even better. Download our calculator app today and experience the ultimate in calculation convenience and accuracy!

Screenshots

CMCalc4 screens
Calculator 4.02 screens

Verdict

The call

The clearest difference is in-app purchases: CMCalc at none against Calculator 4.0's 1. CMCalc also leads on ads (none vs shown). Calculator 4.0's advantage is update cadence (fortnightly vs every 45 months) and rating (4.8 vs 4.5). On price, device support and iOS requirement 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. Calculator 4.0 sells 1 one-off in-app purchase. CMCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculator 4.0 holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Calculator 4.0 has 53 ratings behind it against 6, so its average is the more settled of the two.

UpkeepUpdate frequency

CMCalc ships an update every 45 months, Calculator 4.0 fortnightly. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
CMCalc versus Calculator 4.0: the parameters behind the verdict, then further details
ParameterCMCalcCalculator 4.0
PriceFreeFree
Rating4.5 (6 ratings)4.8 (53 ratings) — better
Positive reviews75.0% of reviews—
Number of ratings653 — better
Update frequencyEvery 45 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.012.0
Further details — not scored
Size4 MB65 MB
Age rating4+4+
DeveloperWilliam DavidEdison Largo

Customer experience

CMCalc

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

Calculator 4.0

All ratings53 ratings
Positive94.3%
Neutral5.7%
Negative0.0%

In-app purchases

None

CMCalc

No in-app purchases

1 purchases

Calculator 4.0

One-time1
  • Remove Ads$5.99

Questions

Is CMCalc free?
CMCalc is free to download, with no in-app purchases.
Is Calculator 4.0 free?
Calculator 4.0 is free to download, with in-app purchases available.
Which has better reviews, CMCalc or Calculator 4.0?
Calculator 4.0 is rated higher. CMCalc averages 4.5 out of 5 from 6 ratings, while Calculator 4.0 averages 4.8 from 53 ratings.
Do CMCalc or Calculator 4.0 have ads?
Calculator 4.0 shows ads; CMCalc does not.
Which is updated more often, CMCalc or Calculator 4.0?
CMCalc ships an update every 45 months, and Calculator 4.0 fortnightly. Most recently, CMCalc was updated on October 9, 2026 and Calculator 4.0 on October 14, 2026.

Other comparisons