# CM2000 vs 云视光

The clearest difference is update cadence: CM2000 at daily against 云视光's fortnightly. CM2000 also leads on iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CM2000 ships an update daily, 云视光 fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | CM2000 | 云视光 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cm2000/id1354326182/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Fortnightly |
| Monetization | Free | — |
| Size | 56 MB | 37 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [宁波明星科技发展有限公司](https://appshunter.io/developer/1271975555) | [Hangzhou Yunshiguang Company Limited](https://appshunter.io/developer/1516745050) |

## What reviewers say

### CM2000

[App page](https://appshunter.io/ios/app/cm2000/id1354326182)

This application allows users to control a vision examination instrument via Bluetooth. It enables selection of visual targets, adjustment of instrument height, and configuration of other related settings. Users can also view descriptions of visual function targets.

**Highlights:** Bluetooth control of vision instrument, Select visual targets, Set instrument height, Configure instrument settings, View visual function target descriptions

**Features:** macOS Compatibility

**In-app purchases:** none


### 云视光

[App page](https://appshunter.io/ios/app/id1516745051)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CM2000 free?

CM2000 is free to download, with no in-app purchases.

### Is 云视光 free?

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

### Do CM2000 or 云视光 have ads?

Neither CM2000 nor 云视光 shows ads.

### Which is updated more often, CM2000 or 云视光?

CM2000 ships an update daily, and 云视光 fortnightly. Most recently, CM2000 was updated on November 2, 2026 and 云视光 on November 3, 2026.

---

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