Comparison

CMCalc vs ZCalcIt

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

ZCalcIt

Read full description

• Basic add, subtraction, multiply, divide, and power calculations. • Create variables to reuse in calculations. • Library of basic functions: sine, cosine, tangent, and more. • Units: Unit conversion (i.e., linear, time, temperature) functions. • Organized a set of calculations into projects for future references. • Documentation: Complete built-in documentation of all functions with numerous examples to get you started quickly.

Screenshots

CMCalc4 screens
ZCalcIt2 screens

Verdict

The call

The clearest difference is update cadence: ZCalcIt at every 11 months against CMCalc's every 45 months. CMCalc's advantage is iOS requirement (12.0 vs 17.2). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CMCalc ships an update every 45 months, ZCalcIt every 11 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard2 real differences · 8 level
CMCalc versus ZCalcIt: the parameters behind the verdict, then further details
ParameterCMCalcZCalcIt
PriceFreeFree
Rating4.6 (7 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 45 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS12.0 — better17.2
Further details — not scored
Size4 MB7 MB
Age rating4+4+
DeveloperWilliam DavidZynergy Apps

In-app purchases

None

CMCalc

No in-app purchases

None

ZCalcIt

No in-app purchases

Questions

Is CMCalc free?
CMCalc is free to download, with no in-app purchases.
Is ZCalcIt free?
ZCalcIt is free to download, with no in-app purchases.
Do CMCalc or ZCalcIt have ads?
Neither CMCalc nor ZCalcIt shows ads.
Which is updated more often, CMCalc or ZCalcIt?
CMCalc ships an update every 45 months, and ZCalcIt every 11 months. Most recently, CMCalc was updated on October 29, 2026 and ZCalcIt on October 27, 2026.

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