CMCalc
William David Utilities iPhoneiPadiPod touch
CMCalc is a free Utilities app for iPhone and iPad by William David. Rated 4.6/5 from 7 ratings. Requires iOS 12.0. Updated February 13, 2026.
- Rating
- 4.6
- 7 ratings
- Price
- Free
- on the App Store
- Size
- 4 MB
- Age 4+
- Updated
- Feb 13
- 2026 · v1.3
Screenshots
About CMCalc
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.
Ratings & reviews
4.6
7 ratings
What’s new
Version 1.3 · Updated 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.
App privacy
The developer, William David, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to CMCalc
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| CMCalc | 4.6 / 5 (7 ratings) | Free | February 13, 2026 | |
| ThetaCalc | 4.3 / 5 (4) | Free | May 17, 2026 | Compare |
| StudentLite | 4.8 / 5 (6) | Free | Jun 12, 2026 | Compare |
| Calculator (Recall Musical) | – | Free | Aug 4, 2025 | Compare |
| Calculator 4.0 | 4.8 / 5 (54) | Free | Mar 3, 2024 | Compare |
| Subnet-Calculator | – | 0.99 USD | Jun 26, 2026 | Compare |
| Daily Counter: Habit Tracker | – | Free | Jul 15, 2026 | Compare |
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