# CMCalc vs ThetaCalc

The clearest difference is update cadence: ThetaCalc at every 3 months against CMCalc's every 45 months. ThetaCalc also leads on review sentiment (100% vs 75%). CMCalc's advantage is rating (4.5 vs 4.3) and iOS requirement (12.0 vs 17.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

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, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews complicate that: 75% of CMCalc's written reviews are positive against 100% of ThetaCalc's, so the app with the better star average is not the one people write more warmly about.

CMCalc ships an update every 45 months, ThetaCalc every 3 months. The most recent releases landed on September 7, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | CMCalc | ThetaCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/cmcalc/id974432836/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/thetacalc/id1521614636/reviews) |
| Number of ratings | **6** | 4 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 4 MB | 1 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [William David](https://appshunter.io/developer/974432835) | [Felix Stehli](https://appshunter.io/developer/1521614638) |

## What reviewers say

### CMCalc

[App page](https://appshunter.io/ios/app/cmcalc/id974432836)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### ThetaCalc

[App page](https://appshunter.io/ios/app/thetacalc/id1521614636)

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

**Highlights:** Reverse Polish Notation (RPN) calculator, User-programmable functions, JavaScript equation support, Extensible functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CMCalc free?

CMCalc is free to download, with no in-app purchases.

### Is ThetaCalc free?

ThetaCalc is free to download, with no in-app purchases.

### Which has better reviews, CMCalc or ThetaCalc?

CMCalc is rated higher. CMCalc averages 4.5 out of 5 from 6 ratings, while ThetaCalc averages 4.3 from 4 ratings.

### Do CMCalc or ThetaCalc have ads?

Neither CMCalc nor ThetaCalc shows ads.

### Which is updated more often, CMCalc or ThetaCalc?

CMCalc ships an update every 45 months, and ThetaCalc every 3 months. Most recently, CMCalc was updated on September 7, 2026 and ThetaCalc on June 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*