# CMCalc vs OpenCCman Open Chinese Convert

The clearest difference is in-app purchases: CMCalc at none against OpenCCman Open Chinese Convert's 1. CMCalc also leads on iOS requirement (12.0 vs 15.0). OpenCCman Open Chinese Convert's advantage is update cadence (every 3 months vs every 45 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. OpenCCman Open Chinese Convert sells 1 one-off in-app purchase. CMCalc asks for nothing beyond the download.

CMCalc ships an update every 45 months, OpenCCman Open Chinese Convert every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CMCalc | OpenCCman Open Chinese Convert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/cmcalc/id974432836/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 4 MB | 21 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [William David](https://appshunter.io/developer/974432835) | [伟 葛](https://appshunter.io/developer/1028908732) |

## 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


### OpenCCman Open Chinese Convert

[App page](https://appshunter.io/ios/app/openccman-open-chinese-convert/id6474449401)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $2.99 | one-time |


## Frequently asked questions

### Is CMCalc free?

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

### Is OpenCCman Open Chinese Convert free?

OpenCCman Open Chinese Convert is free to download, with in-app purchases available.

### Do CMCalc or OpenCCman Open Chinese Convert have ads?

Neither CMCalc nor OpenCCman Open Chinese Convert shows ads.

### Which is updated more often, CMCalc or OpenCCman Open Chinese Convert?

CMCalc ships an update every 45 months, and OpenCCman Open Chinese Convert every 3 months. Most recently, CMCalc was updated on October 24, 2026 and OpenCCman Open Chinese Convert on October 25, 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.*