CMCalc vs ColorPiano Programmer
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.
ColorPiano Programmer
Design custom light shows in real-time by tapping on your smartphone like a piano. Create mood lighting or dynamic effects. Requires specific hardware to operate.
- Real-time light show programming
- Piano-style interface
- Create mood lighting
- Design fast flashy effects
- Requires ColorPiano hardware
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If you can operate a remote, you can become a lighting designer with ColorPiano! Our app and hardware allow you program your own light show in real time by tapping on your smart phone like a piano. Create soft mood setting light sequences or fast flashy effects, unleash your colorful creativity with ColorPiano. NOTE: this app only works with the ColorPiano hardware. Find how where to purchase from colorpiano.us
Screenshots
Verdict
The clearest difference is review sentiment: CMCalc at 75% against ColorPiano Programmer's 0%. CMCalc also leads on rating (4.6 vs 1.0) and ratings volume (7 vs 1). ColorPiano Programmer's advantage is update cadence (every 5 weeks vs every 45 months) and iOS requirement (8.0 vs 12.0). 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.
CMCalc holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: CMCalc has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of CMCalc's written reviews are positive against 0% of ColorPiano Programmer's.
CMCalc ships an update every 45 months, ColorPiano Programmer every 5 weeks. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.
| Parameter | CMCalc | ColorPiano Programmer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (7 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 75.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 45 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | William David | Gantom |
Customer experience
CMCalc
ColorPiano Programmer
In-app purchases
CMCalc
No in-app purchases
ColorPiano Programmer
No in-app purchases
Questions
Is CMCalc free?
Is ColorPiano Programmer free?
Which has better reviews, CMCalc or ColorPiano Programmer?
Do CMCalc or ColorPiano Programmer have ads?
Which is updated more often, CMCalc or ColorPiano Programmer?
Other comparisons
