# NSLookup Z vs HeaderX

The clearest difference is in-app purchases: HeaderX at none against NSLookup Z's 1. HeaderX also leads on device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. NSLookup Z sells 1 one-off in-app purchase. HeaderX asks for nothing beyond the download.

NSLookup Z ships an update every 5 days, HeaderX every 8 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NSLookup Z | HeaderX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/nslookup-z-fast-dns-query-tool/id6743503420/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 8 days |
| Monetization | Free | — |
| Size | 2 MB | 1 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhut](https://appshunter.io/developer/849063753) | [Gyuman Kim](https://appshunter.io/developer/1120436841) |

## What reviewers say

### NSLookup Z

[App page](https://appshunter.io/ios/app/nslookup-z-fast-dns-query-tool/id6743503420)

This tool allows for fast and secure DNS record lookups, supporting encrypted queries and a variety of popular DNS servers. Users can also configure custom DNS servers for complete control over their network analysis.

**Highlights:** Query DNS records (A, AAAA, CNAME, TXT, etc.), Support for DoH & DoT encrypted lookups, Includes popular DNS servers (Google, Cloudflare), Option to customize DNS servers

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | 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 NSLookup Z free?

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

### Is HeaderX free?

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

### Do NSLookup Z or HeaderX have ads?

Neither NSLookup Z nor HeaderX shows ads.

### Which is updated more often, NSLookup Z or HeaderX?

NSLookup Z ships an update every 5 days, and HeaderX every 8 days. Most recently, NSLookup Z was updated on November 4, 2026 and HeaderX on October 31, 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.*