# iPerfman vs KFEI CSViewer

The clearest difference is in-app purchases: KFEI CSViewer at none against iPerfman's 2. KFEI CSViewer also leads on update cadence (every 5 days vs every 3 weeks). iPerfman's advantage is device support (5 vs 2) and iOS requirement (15.0 vs 17.6). On price and ads there is nothing between them.

Both are free to download. iPerfman sells 2 one-off in-app purchases. KFEI CSViewer asks for nothing beyond the download.

iPerfman ships an update every 3 weeks, KFEI CSViewer every 5 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | iPerfman | KFEI CSViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4 ratings)](https://appshunter.io/ios/app/iperfman/id6447375831/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 3 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [伟 葛](https://appshunter.io/developer/1028908732) | [KAGA FEI Co., Ltd.](https://appshunter.io/developer/1635192113) |

## What reviewers say

### iPerfman

[App page](https://appshunter.io/ios/app/iperfman/id6447375831)

This utility measures maximum achievable bandwidth on IP networks across Apple platforms. It offers a beautiful speedometer and speed chart, allowing for LAN testing and advanced parameter adjustments to simulate network conditions.

**Highlights:** Bandwidth measurement, Speedometer and speed chart, LAN network testing, Customizable test parameters, UDP mode performance testing, Bandwidth limiting simulation

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $1.99 | one-time |
| Lifetime Pro | $2.99 | one-time |


### KFEI CSViewer

[App page](https://appshunter.io/ios/app/kfei-csviewer/id6771185904)

**In-app purchases:** none


## Frequently asked questions

### Is iPerfman free?

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

### Is KFEI CSViewer free?

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

### Do iPerfman or KFEI CSViewer have ads?

Neither iPerfman nor KFEI CSViewer shows ads.

### Which is updated more often, iPerfman or KFEI CSViewer?

iPerfman ships an update every 3 weeks, and KFEI CSViewer every 5 days. Most recently, iPerfman was updated on October 24, 2026 and KFEI CSViewer on October 17, 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.*