CMCalc vs Adam's Calc
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.
Adam's Calc
A utility calculator that adds memory functionality to standard calculations. Designed to make your device's calculator more helpful by remembering previous results.
- Memory function for calculations
- Enhanced utility calculator
- Intuitive design
- Remembers previous results
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Adam's Calc is a utility calculator designed by rdConcepts. This design is intended to help make the standard calculator more useful by building some "memory" into the device. Inspiration -> Donald Norman.
Screenshots
Verdict
The clearest difference is in-app purchases: CMCalc at none against Adam's Calc's 1. CMCalc also leads on ads (none vs shown) and ratings volume (7 vs 2). Adam's Calc's advantage is rating (5.0 vs 4.6) and update cadence (every 4 months vs every 45 months). On price 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
Both are free to download. Adam's Calc sells 1 one-off in-app purchase. CMCalc asks for nothing beyond the download.
Adam's Calc holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 2 respectively.
CMCalc ships an update every 45 months, Adam's Calc every 4 months. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.
| Parameter | CMCalc | Adam's Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (7 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 45 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | William David | RD Concepts |
Customer experience
CMCalc
Adam's Calc
In-app purchases
CMCalc
No in-app purchases
Adam's Calc
- Remove Advertising$2.99
