# CastDuo vs QuickWriteAI

The clearest difference is ads: QuickWriteAI at none against CastDuo's shown. QuickWriteAI also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.6). CastDuo's advantage is update cadence (every 8 days vs every 2 weeks). On price and in-app purchases there is nothing between them.

Both are free to download. CastDuo sells 14 in-app purchases, starting at $2.49 per 7 days and QuickWriteAI sells 2 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

CastDuo ships an update every 8 days, QuickWriteAI every 2 weeks. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | CastDuo | QuickWriteAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (94 ratings)](https://appshunter.io/ios/app/castduo-screen-mirroring-app/id6593663296/reviews)** | — |
| Number of ratings | **94** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 65 MB | 55 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ECO MOBILE JOINT STOCK COMPANY](https://appshunter.io/developer/1609177811) | [QuickWriteAI LLC](https://appshunter.io/developer/1858756026) |

## What reviewers say

### CastDuo

[App page](https://appshunter.io/ios/app/castduo-screen-mirroring-app/id6593663296)

Transform your phone into a big-screen experience by wirelessly casting photos, videos, and web content to your smart TV. Enjoy seamless, lag-free mirroring for entertainment, presentations, or gaming.

**Highlights:** Seamless photo, video, and music casting, Zero-delay screen mirroring, Direct web video streaming, Effortless smart TV connectivity, Lag-free performance, High-definition playback

**Features:** macOS Compatibility

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Smart Cast Subscription | $2.49 | per 7 days |
| Weekly Mirroring Discount | $3.49 | per 7 days |
| Weekly Mirroring Subscription | $4.99 | per 7 days |
| Weekly Smart Cast Subscription | $5.99 | per 7 days |
| Weekly Mirroring Subscription | $6.99 | per 7 days |
| Yearly Mirroring Subscription | $12.49 | per year |
| Monhtly SmartCast Subscription | $12.99 | per month |
| Yearly Subscription Discount | $19.99 | per year |
| Yearly Mirroring Subscription | $29.99 | per year |
| Yearly Subscription | $49.99 | per year |
| Yearly Subscription | $59.99 | per year |
| Lifetime Smart Cast | $18.99 | one-time |
| Onetime payment special offer | $29.99 | one-time |
| Lifetime Smart Cast | $34.99 | one-time |


### QuickWriteAI

[App page](https://appshunter.io/ios/app/quickwriteai/id6756153858)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $11.99 | per month |
| Premium (Yearly) | $119.00 | per year |


## Frequently asked questions

### Is CastDuo free?

CastDuo is free to download, with in-app purchases available.

### Is QuickWriteAI free?

QuickWriteAI is free to download, with in-app purchases available.

### Do CastDuo or QuickWriteAI have ads?

CastDuo shows ads; QuickWriteAI does not.

### Which is updated more often, CastDuo or QuickWriteAI?

CastDuo ships an update every 8 days, and QuickWriteAI every 2 weeks. Most recently, CastDuo was updated on October 15, 2026 and QuickWriteAI on October 5, 2026.

---

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