# 极速投屏 vs Mental arithmetic quiz

The clearest difference is in-app purchases: Mental arithmetic quiz at none against 极速投屏's 3. 极速投屏's advantage is update cadence (every 2 days vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 极速投屏 sells 3 in-app purchases, starting at $4.49 per 7 days. Mental arithmetic quiz asks for nothing beyond the download.

极速投屏 ships an update every 2 days, Mental arithmetic quiz every 8 days. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 极速投屏 | Mental arithmetic quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.2 (5 ratings)](https://appshunter.io/ios/app/tv/id1606880215/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 8 days |
| Monetization | Freemium | — |
| Size | 20 MB | 38 MB |
| Requires iOS | **11.0** | 12.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Dongzu Technology Co.,Ltd.](https://appshunter.io/developer/1591729612) | [LiRen Sun](https://appshunter.io/developer/1649265349) |

## What reviewers say

### 极速投屏

[App page](https://appshunter.io/ios/app/tv/id1606880215)

This app acts as a smart assistant for casting your phone screen to your TV. It supports quick connections for interactive viewing of videos and presentations. Enjoy a seamless experience for local media playback and file sharing on a larger screen.

**Highlights:** One-click connection, Fast screen casting, Mainstream video format playback, File casting for presentations, Audio and video casting, Network video streaming

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级周订阅 | $4.49 | per 7 days |
| 高级月订阅 | $7.49 | per month |
| 极光年度高级助手 | $30.99 | per year |


### Mental arithmetic quiz

[App page](https://appshunter.io/ios/app/mental-arithmetic-quiz/id6443785734)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 极速投屏 free?

极速投屏 is free to download, with in-app purchases available.

### Is Mental arithmetic quiz free?

Mental arithmetic quiz is free to download, with no in-app purchases.

### Do 极速投屏 or Mental arithmetic quiz have ads?

Neither 极速投屏 nor Mental arithmetic quiz shows ads.

### Which is updated more often, 极速投屏 or Mental arithmetic quiz?

极速投屏 ships an update every 2 days, and Mental arithmetic quiz every 8 days. Most recently, 极速投屏 was updated on November 3, 2026 and Mental arithmetic quiz 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.*