# EV扩展屏 vs 保全系统企业端

The clearest difference is update cadence: EV扩展屏 at every 3 months against 保全系统企业端's every 19 months. 保全系统企业端's advantage is iOS requirement (13.0 vs 15.0). 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.

EV扩展屏 ships an update every 3 months, 保全系统企业端 every 19 months. The most recent releases landed on October 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | EV扩展屏 | 保全系统企业端 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ev/id6443439614/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | Free | — |
| Size | 9 MB | 2 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [振宇 胡](https://appshunter.io/developer/1190222874) | [风语者科技(北京)有限公司](https://appshunter.io/developer/997196307) |

## What reviewers say

### EV扩展屏

[App page](https://appshunter.io/ios/app/ev/id6443439614)

This utility app allows you to use your mobile device as an external display for your computer. It supports both extended and mirrored screen modes, and can also sync your computer's audio to your phone or tablet.

**Highlights:** WiFi connection, Dual screen collaboration, Extended display mode, Mirrored display mode, Computer audio sync

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

**In-app purchases:** none


### 保全系统企业端

[App page](https://appshunter.io/ios/app/id6453758320)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EV扩展屏 free?

EV扩展屏 is free to download, with no in-app purchases.

### Is 保全系统企业端 free?

保全系统企业端 is free to download, with no in-app purchases.

### Do EV扩展屏 or 保全系统企业端 have ads?

Neither EV扩展屏 nor 保全系统企业端 shows ads.

### Which is updated more often, EV扩展屏 or 保全系统企业端?

EV扩展屏 ships an update every 3 months, and 保全系统企业端 every 19 months. Most recently, EV扩展屏 was updated on October 3, 2026 and 保全系统企业端 on October 27, 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.*