Comparison

CMCalc vs FunctionCalc

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

FunctionCalc

This all-in-one utility app helps veterans calculate VA disability benefits, track important dates, and perform everyday calculations. It includes a tip splitter, unit converter, and a powerful calculator with saved formulas.

Highlights
  • VA disability benefit calculator
  • Date countdown and elapsed time tracker
  • Tip calculator and bill splitting
  • Unit and currency converter
  • Time math and custom formulas
  • Full calculation history
Features
Read full description

VA disability calculator, date tracker, tip splitter, unit converter, and powerful everyday calculator in one app. Built for veterans and useful for everyone, this all-in-one toolkit helps you calculate VA disability benefits, track important dates, do time math, split bills, convert units and currency, and save formulas you use again and again. Whether you are planning a new claim, checking a countdown, or solving everyday math faster, everything is in one clean, easy-to-use app. VA Disability Calculator Enter your service-connected ratings and instantly see your combined disability rating using the official VA combined rating method, rounded the way the VA does it. Estimate monthly compensation based on your rating, dependents, marital status, and spouse Aid & Attendance eligibility. Create what-if scenarios by adding, removing, or changing ratings to see how a new claim, rating increase, appeal, or dependent update could affect your monthly pay before you file or submit changes. Date Calculator Track the time to or from any date that matters. Save sobriety milestones, anniversaries, retirement countdowns, due dates, memorial dates, birthdays, and more. See a live breakdown in years, months, days, hours, minutes, and seconds. Tap any unit to view the full span as a single total, including total days or total hours. Calculator Use a full-featured calculator with a clean interface, live results, and full history. See your complete expression as you type and get answers fast. Tip Calculator Calculate tips and split the bill in seconds. Choose your tip, select the number of people, and instantly see accurate per-person totals. Time Math Work with time the way you think. Enter values like 1:45, use them in calculations, and convert between time format and decimals with one tap. Function Calculator Access thousands of conversions and formulas in one place. Convert length, mass, volume, temperature, speed, area, data storage, and more, including live currency exchange rates. Browse built-in formulas or create your own custom formulas and save them for quick access. Why you'll love it: • VA combined rating calculator with estimated monthly compensation • What-if VA disability scenarios for ratings and dependent changes • Date countdowns and elapsed time tracking • Tip calculator and bill splitting • Time-format math • Unit conversions and live currency rates • Custom formulas and quick access favorites • Full calculation history • Clean dark interface • No ads. No subscriptions.

Screenshots

CMCalc4 screens
FunctionCalc4 screens

Verdict

The call

The clearest difference is price: CMCalc at Free against FunctionCalc's $0.99. CMCalc also leads on iOS requirement (12.0 vs 26.2). FunctionCalc's advantage is rating (5.0 vs 4.5) and update cadence (every 8 days vs every 45 months). On ratings volume, 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

CMCalc is free to download; FunctionCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

FunctionCalc holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 6 and 13 respectively. Written reviews point the same way: 75% of CMCalc's written reviews are positive against 100% of FunctionCalc's.

UpkeepUpdate frequency

CMCalc ships an update every 45 months, FunctionCalc every 8 days. The most recent releases landed on October 9, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
CMCalc versus FunctionCalc: the parameters behind the verdict, then further details
ParameterCMCalcFunctionCalc
PriceFree — better$0.99
Rating4.5 (6 ratings)5.0 (13 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings613 — better
Update frequencyEvery 45 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better26.2
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperWilliam DavidLawler Innovations, Inc

Customer experience

CMCalc

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

FunctionCalc

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CMCalc

No in-app purchases

None

FunctionCalc

No in-app purchases

Questions

Is CMCalc free?
CMCalc is free to download, with no in-app purchases.
Is FunctionCalc free?
FunctionCalc costs $0.99, with no in-app purchases.
Which has better reviews, CMCalc or FunctionCalc?
FunctionCalc is rated higher. CMCalc averages 4.5 out of 5 from 6 ratings, while FunctionCalc averages 5.0 from 13 ratings.
Do CMCalc or FunctionCalc have ads?
Neither CMCalc nor FunctionCalc shows ads.
Which is updated more often, CMCalc or FunctionCalc?
CMCalc ships an update every 45 months, and FunctionCalc every 8 days. Most recently, CMCalc was updated on October 9, 2026 and FunctionCalc on September 23, 2026.

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