CMCalc vs KeyCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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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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.
KeyCalc
This calculator app offers a fun, retro-style interface inspired by mechanical keyboards and vintage LED displays. It provides a simple and enjoyable user experience for everyday calculations.
- Retro calculator design
- Mechanical keyboard inspiration
- Vintage LED display aesthetic
- Simple and fun interface
- Basic calculation functions
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A fun and simple retro-style calculator. Inspired by mechanical keyboards and vintage LED displays.
Screenshots
Verdict
The clearest difference is rating: KeyCalc at 5.0 against CMCalc's 4.6. KeyCalc also leads on review sentiment (100% vs 75%). CMCalc's advantage is ratings volume (7 vs 2) and iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
KeyCalc holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 75% of CMCalc's written reviews are positive against 100% of KeyCalc's.
| Parameter | CMCalc | KeyCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (7 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 45 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | William David | Wayne Dahlberg |
Customer experience
CMCalc
KeyCalc
In-app purchases
CMCalc
No in-app purchases
KeyCalc
No in-app purchases
