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CMCalc

CMCalc

Computer Math Calculator

6 ratings
4 reviews
🔧 Utilities
📊 Productivity

Archived App (Last seen on 13 May 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • March 12, 2015
  • February 13, 2026

Features

Developer

William David
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⭐4
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🔄6+ apps
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❓8 answered
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About

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.

✓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
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What's New in CMCalc

1.3

February 13, 2026

Version 1.3 of CMCalc introduces support for hardware keyboards. The primary display font was redesigned to more closely resemble that of the original calculator. Pressed buttons now flash in all views.

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User reviews

Most RecentHighest RatedLowest Rated

Amazing Calculator

Amazing calculator, love the hms conversion option!
hDave053hDave053

An awesome app for CM-100 calculator fans!

Brilliant to have this app available. The CM-100 is an excellent and unique computer math calculator ideal for assembly programmers and retro computer enthusiasts, and this app means anyone with an iPhone can enjoy having one readily available for use in their work or just to play around. 5 stars!
vmailiavmailia

Does not work with IOS 12

Love this calculator and it stopped working after IOS 12 update. 😞
RjhdakotaRjhdakota

It's OK.

I have a cm100 (from the eighties) and its a fantastic calculator for programmers. Mine still worked perfectly until the other day when the "A" key fell off. I was hoping this would be a good replacement. Its just OK. One of the most annoying things is that when you push the HEX, BIN, OCT keys it doesn't put populate the display with the leading zeros. For some reason that really bugs me. I also enjoy emulators that go the extra mile. For instance, the cm100 puts a little +,-,* etc on the right hand side of the screen when using those. This doesn't, it has a really annoying text box at the top which looks awful and ruins the whole feel of the app.
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TigerPhoneTigerPhone

FAQ

What functions does CMCalc perform?

CMCalc performs simple decimal arithmetic, basic binary conversions (decimal, binary, octal, hexadecimal), and binary logic functions. It also supports operator grouping with parentheses for complex calculations.

Does CMCalc have ads?

No, CMCalc is ad-free. It does not contain any advertisements, providing an uninterrupted user experience.

What devices is CMCalc available on?

CMCalc is available for iPhone and iPod devices. It supports landscape mode on devices with 4-inch or larger screens.

How often is CMCalc updated?

The latest version of CMCalc is 1.3, last updated on February 13, 2026. While the release date was March 12, 2015, the last update indicates ongoing maintenance.

What is the age rating for CMCalc?

CMCalc has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

Can I input hexadecimal numbers in CMCalc?

Yes, CMCalc supports hexadecimal calculations. The input keys include A through F for hexadecimal number entry.

What makes CMCalc different from a standard calculator?

CMCalc emulates a specific 1980s Casio model and includes binary conversion and logic functions not found on basic calculators. It also offers modern features like copy/paste and landscape mode.

What is the user sentiment for CMCalc?

CMCalc is highly rated, with an average of 4.5 stars from 6 ratings. This suggests a positive user experience and satisfaction with its functionality.