# AiEngine vs AI Email Writer

The clearest difference is in-app purchases: AiEngine at none against AI Email Writer's 3. AiEngine also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | AiEngine | AI Email Writer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 27 MB | 6 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [MoSec Solutions GmbH](https://appshunter.io/developer/1668325195) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### AiEngine

[App page](https://appshunter.io/ios/app/aiengine/id1668325193)

**Features:** macOS Compatibility

**In-app purchases:** none


### AI Email Writer

[App page](https://appshunter.io/ios/app/ai-email-writer-smart-reply/id6767789113)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Annual Premium | $24.99 | per year |
| Lifetime Premium | $49.99 | one-time |


## Frequently asked questions

### Is AiEngine free?

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

### Is AI Email Writer free?

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

### Do AiEngine or AI Email Writer have ads?

Neither AiEngine nor AI Email Writer shows ads.

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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.*