# Assembly Compiler vs HeaderX

The clearest difference is price: HeaderX at Free against Assembly Compiler's $5.99. HeaderX also leads on in-app purchases (none vs 3) and update cadence (every 8 days vs every 3 months). On ads there is nothing between them.

HeaderX is free to download; Assembly Compiler costs $5.99 up front. Assembly Compiler sells 3 in-app purchases, starting at $4.99 per month. HeaderX asks for nothing beyond the download.

Assembly Compiler ships an update every 3 months, HeaderX every 8 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Assembly Compiler | HeaderX |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Size | 85 MB | 1 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [Gyuman Kim](https://appshunter.io/developer/1120436841) |

## What reviewers say

### Assembly Compiler

[App page](https://appshunter.io/ios/app/assembly-compilerai-assistant/id6777645963)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30天会员 | $4.99 | per month |
| 360天会员 | $24.99 | per year |
| 终身会员 | $69.99 | one-time |


### HeaderX

[App page](https://appshunter.io/ios/app/headerx/id6790552565)

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Assembly Compiler free?

Assembly Compiler costs $5.99, and also offers in-app purchases.

### Is HeaderX free?

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

### Do Assembly Compiler or HeaderX have ads?

Neither Assembly Compiler nor HeaderX shows ads.

### Which is updated more often, Assembly Compiler or HeaderX?

Assembly Compiler ships an update every 3 months, and HeaderX every 8 days. Most recently, Assembly Compiler was updated on October 25, 2026 and HeaderX on October 25, 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.*