# NSLookup Z vs JS Server

The clearest difference is price: NSLookup Z at Free against JS Server's $4.99. JS Server's advantage is in-app purchases (none vs 1) and update cadence (daily vs every 5 days). On ads, device support and iOS requirement there is nothing between them.

NSLookup Z is free to download; JS Server costs $4.99 up front. NSLookup Z sells 1 one-off in-app purchase. JS Server asks for nothing beyond the download.

NSLookup Z ships an update every 5 days, JS Server daily. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NSLookup Z | JS Server |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/nslookup-z-fast-dns-query-tool/id6743503420/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Free | — |
| Size | 2 MB | 3 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhut](https://appshunter.io/developer/849063753) | [Tomasz Dbrowski](https://appshunter.io/developer/1502160778) |

## 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 |


### JS Server

[App page](https://appshunter.io/ios/app/js-server/id6763173863)

**Features:** macOS Compatibility, 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 JS Server free?

JS Server costs $4.99, with no in-app purchases.

### Do NSLookup Z or JS Server have ads?

Neither NSLookup Z nor JS Server shows ads.

### Which is updated more often, NSLookup Z or JS Server?

NSLookup Z ships an update every 5 days, and JS Server daily. Most recently, NSLookup Z was updated on October 28, 2026 and JS Server on October 25, 2026.

---

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