# 投屏助手 vs Instant Cal

The clearest difference is in-app purchases: Instant Cal at none against 投屏助手's 6. Instant Cal also leads on update cadence (every 2 weeks vs every 4 months). 投屏助手's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. 投屏助手 sells 6 in-app purchases, starting at $0.99 per 7 days. Instant Cal asks for nothing beyond the download.

投屏助手 ships an update every 4 months, Instant Cal every 2 weeks. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 投屏助手 | Instant Cal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 29 MB | 31 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [伊凡 马](https://appshunter.io/developer/1804172759) | [Taek Oh](https://appshunter.io/developer/1616205954) |

## What reviewers say

### 投屏助手

[App page](https://appshunter.io/ios/app/and/id6739403795)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 鸣思投屏助手:周度高级权限服务订阅 | $0.99 | per 7 days |
| 鸣思投屏助手:季度高级权限服务订阅 | $3.99 | per 3 months |
| 鸣思投屏助手:周度高级权限订阅 | $3.99 | per 7 days |
| 投屏助手：高级服务权限周度订阅 | $4.99 | per 7 days |
| 鸣思投屏助手:季度高级权限订阅 | $24.99 | per 3 months |
| 投屏助手：高级服务权限季度订阅 | $29.99 | per 3 months |


### Instant Cal

[App page](https://appshunter.io/ios/app/instant-cal/id6772655662)

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

**In-app purchases:** none


## Frequently asked questions

### Is 投屏助手 free?

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

### Is Instant Cal free?

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

### Do 投屏助手 or Instant Cal have ads?

Instant Cal shows ads; 投屏助手 does not.

### Which is updated more often, 投屏助手 or Instant Cal?

投屏助手 ships an update every 4 months, and Instant Cal every 2 weeks. Most recently, 投屏助手 was updated on October 9, 2026 and Instant Cal on October 20, 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.*