# Z80CPM vs CalcBoard

The clearest difference is in-app purchases: Z80CPM at none against CalcBoard's 1. Z80CPM also leads on update cadence (every 10 days vs every 3 months) and device support (4 vs 2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. CalcBoard sells 1 one-off in-app purchase. Z80CPM asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Z80CPM against 5.0 for CalcBoard. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Z80CPM ships an update every 10 days, CalcBoard every 3 months. The most recent releases landed on October 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Z80CPM | CalcBoard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/z80cpm/id6756590871/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/calcboard-multi-calculator/id6759535339/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 50 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aaron Wohl](https://appshunter.io/developer/1860336063) | [Colby Clark](https://appshunter.io/developer/1110053823) |

## What reviewers say

### Z80CPM

[App page](https://appshunter.io/ios/app/z80cpm/id6756590871)

Experience the classic CP/M operating system on your iOS or Mac device with a full Z80 processor emulator. Run authentic CP/M software, including operating systems, word processors, programming languages, and text adventures. Works offline with support for multiple disk images.

**Highlights:** Full Z80 emulation, VT100 terminal support, Multiple disk image mounting, Offline functionality, Native Mac support, Downloadable CP/M disk images

**Features:** Vision Pro support

**In-app purchases:** none


### CalcBoard

[App page](https://appshunter.io/ios/app/calcboard-multi-calculator/id6759535339)

Perform multiple calculations simultaneously on one screen, compare prices side-by-side, and access various modes like scientific and programmer. This ad-free utility offers precise results and stores your data locally.

**Highlights:** Multiple independent calculator panels, Side-by-side price comparison, Scientific, programmer, and unit converter modes, Visible expression history, Shared value tray for chaining calculations, Named variables for complex formulas, Ad-free and no tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcBoard Premium | $2.99 | one-time |


## Frequently asked questions

### Is Z80CPM free?

Z80CPM is free to download, with no in-app purchases.

### Is CalcBoard free?

CalcBoard is free to download, with in-app purchases available.

### Which has better reviews, Z80CPM or CalcBoard?

Z80CPM and CalcBoard are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Z80CPM or CalcBoard have ads?

Neither Z80CPM nor CalcBoard shows ads.

### Which is updated more often, Z80CPM or CalcBoard?

Z80CPM ships an update every 10 days, and CalcBoard every 3 months. Most recently, Z80CPM was updated on October 5, 2026 and CalcBoard on October 28, 2026.

---

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