# DNS测速 vs Diff Checker

The clearest difference is update cadence: Diff Checker at every 2 months against DNS测速's every 5 months. DNS测速's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. DNS测速 sells 1 one-off in-app purchase and Diff Checker sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

DNS测速 ships an update every 5 months, Diff Checker every 2 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DNS测速 | Diff Checker |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [兴龙 张](https://appshunter.io/developer/1576162823) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### DNS测速

[App page](https://appshunter.io/ios/app/dns/id6470105015)

Optimize your network speed by testing and selecting the best DNS servers. This tool measures DNS latency and resolution times to help you reduce connection delays and improve your overall online experience.

**Highlights:** DNS latency testing, DNS resolution delay testing, TCP connectivity testing, Network optimization, DNS server selection

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 测速会员 | $0.99 | one-time |


### Diff Checker

[App page](https://appshunter.io/ios/app/diff-checker-text-compare/id6772266827)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Yearly | $14.99 | per year |


## Frequently asked questions

### Is DNS测速 free?

DNS测速 is free to download, with in-app purchases available.

### Is Diff Checker free?

Diff Checker is free to download, with in-app purchases available.

### Do DNS测速 or Diff Checker have ads?

Neither DNS测速 nor Diff Checker shows ads.

### Which is updated more often, DNS测速 or Diff Checker?

DNS测速 ships an update every 5 months, and Diff Checker every 2 months. Most recently, DNS测速 was updated on October 30, 2026 and Diff Checker 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.*