# 四年级奥数专业版 vs 投屏助手

The clearest difference is price: 投屏助手 at Free against 四年级奥数专业版's $0.99. 投屏助手 also leads on update cadence (every 3 months vs every 12 months). 四年级奥数专业版's advantage is in-app purchases (none vs 6) and iOS requirement (8.0 vs 15.0). On ads and device support there is nothing between them.

投屏助手 is free to download; 四年级奥数专业版 costs $0.99 up front. 投屏助手 sells 6 in-app purchases, starting at $0.99 per 7 days. 四年级奥数专业版 asks for nothing beyond the download.

四年级奥数专业版 ships an update every 12 months, 投屏助手 every 3 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 四年级奥数专业版 | 投屏助手 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 17 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [志军 王](https://appshunter.io/developer/842570665) | [Aero Surge Technology Limited](https://appshunter.io/developer/1787967361) |

## What reviewers say

### 四年级奥数专业版

[App page](https://appshunter.io/ios/app/id1208534417)

**Features:** macOS Compatibility

**In-app purchases:** none


### 投屏助手

[App page](https://appshunter.io/ios/app/and/id6740068577)

Easily cast your phone's content to a TV with this smart screen mirroring app. It supports various media types, offers image editing, video adjustments, and audio casting. Additionally, it includes helpful tools like a customizable ticker, image stitcher, and reminders.

**Highlights:** Smart screen mirroring to TV, Image casting with editing, Video casting with adjustments, Audio casting, Customizable ticker (bullet screen), Image stitching, Reminder and timer functions

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 智能投屏助手：周度高级权限服务订阅 | $0.99 | per 7 days |
| 智能投屏助手：季度高级权限服务订阅 | $3.99 | per 3 months |
| 投屏助手大师：高级权限服务周度订阅 | $3.99 | per 7 days |
| 手机投屏助手：高级权限服务周度订阅 | $4.99 | per 7 days |
| 投屏助手大师：高级权限服务季度订阅 | $19.99 | per 3 months |
| 手机投屏助手：高级权限服务季度订阅 | $24.99 | per 3 months |


## Frequently asked questions

### Is 四年级奥数专业版 free?

四年级奥数专业版 costs $0.99, with no in-app purchases.

### Is 投屏助手 free?

投屏助手 is free to download, with in-app purchases available.

### Do 四年级奥数专业版 or 投屏助手 have ads?

Neither 四年级奥数专业版 nor 投屏助手 shows ads.

### Which is updated more often, 四年级奥数专业版 or 投屏助手?

四年级奥数专业版 ships an update every 12 months, and 投屏助手 every 3 months. Most recently, 四年级奥数专业版 was updated on October 24, 2026 and 投屏助手 on October 30, 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.*