# CAiA vs AI Email Generator：Mail Writer

The clearest difference is in-app purchases: CAiA at none against AI Email Generator：Mail Writer's 3. CAiA also leads on iOS requirement (12.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. AI Email Generator：Mail Writer sells 3 in-app purchases, starting at $4.99 per 7 days. CAiA asks for nothing beyond the download.

CAiA ships an update every 6 weeks, AI Email Generator：Mail Writer every 3 weeks. The most recent releases landed on October 3, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | CAiA | AI Email Generator：Mail Writer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (9 ratings)](https://appshunter.io/ios/app/ai-email-generatormail-writer/id6466037521/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | — | Subscription |
| Size | 50 MB | 146 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Norray Resource Pty. Ltd.](https://appshunter.io/developer/1054877991) | [Anastasiia Hubarenko](https://appshunter.io/developer/1634180381) |

## What reviewers say

### CAiA

[App page](https://appshunter.io/ios/app/caia/id1251237352)

**Features:** macOS Compatibility

**In-app purchases:** none


### AI Email Generator：Mail Writer

[App page](https://appshunter.io/ios/app/ai-email-generatormail-writer/id6466037521)

This app leverages AI and chatbot technology to simplify email management. It helps you compose professional emails, track their delivery, and automate inbox organization. Secure your communications with advanced features.

**Highlights:** AI email generation, Email tracking, Email automation, Secure email account, Voice input for requests, Multi-language email support

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Email Generator | $4.99 | per 7 days |
| Mail Writer | $4.99 | per 7 days |
| AI Email Generator：Mail Writer | $9.99 | per 7 days |


## Frequently asked questions

### Is CAiA free?

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

### Is AI Email Generator：Mail Writer free?

AI Email Generator：Mail Writer is free to download, with in-app purchases available.

### Which is updated more often, CAiA or AI Email Generator：Mail Writer?

CAiA ships an update every 6 weeks, and AI Email Generator：Mail Writer every 3 weeks. Most recently, CAiA was updated on October 3, 2026 and AI Email Generator：Mail Writer on September 16, 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.*