# iPerf3 Client & Server vs eMonSys

The clearest difference is review sentiment: iPerf3 Client & Server at 50% against eMonSys's 0%. iPerf3 Client & Server also leads on rating (4.9 vs 1.0) and update cadence (every 5 days vs fortnightly). eMonSys's advantage is price (Free vs $6.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

eMonSys is free to download; iPerf3 Client & Server costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iPerf3 Client & Server holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: iPerf3 Client & Server has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of iPerf3 Client & Server's written reviews are positive against 0% of eMonSys's.

iPerf3 Client & Server ships an update every 5 days, eMonSys fortnightly. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | iPerf3 Client & Server | eMonSys |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/iperf3-client-and-server/id6755545337/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/emonsys/id6755714095/reviews) |
| Number of ratings | **9** | 1 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Paid | **Free** |
| Size | 9 MB | 7 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vladimir Chemeris](https://appshunter.io/developer/1854526571) | [Shenzhen ShengXingWei Electronic Technology Co., Ltd.](https://appshunter.io/developer/1855796054) |

## What reviewers say

### iPerf3 Client & Server

[App page](https://appshunter.io/ios/app/iperf3-client-and-server/id6755545337)

Measure real network throughput across Wi-Fi, cellular, VPN, or LAN. This tool helps compare network devices, validate changes, and identify bottlenecks with detailed metrics and advanced controls. It requires access to an iPerf3 server.

**Highlights:** Client and server modes, TCP/UDP tests, Advanced test controls, Shortcuts automation, Saved server profiles, History with charts, Detailed network metrics

**Features:** Vision Pro support

**In-app purchases:** none


### eMonSys

[App page](https://appshunter.io/ios/app/emonsys/id6755714095)

Monitor your electricity usage in real-time, track consumption history, and analyze potential savings. Receive alerts for energy waste and view data through intuitive charts and graphs.

**Highlights:** Real-time electricity monitoring, Usage history and data replay, Potential savings analysis, Energy waste alerts, Intuitive data presentation

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

**In-app purchases:** none


## Frequently asked questions

### Is iPerf3 Client & Server free?

iPerf3 Client & Server costs $6.99, with no in-app purchases.

### Is eMonSys free?

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

### Which has better reviews, iPerf3 Client & Server or eMonSys?

iPerf3 Client & Server is rated higher. iPerf3 Client & Server averages 4.9 out of 5 from 9 ratings, while eMonSys averages 1.0 from 1 ratings.

### Do iPerf3 Client & Server or eMonSys have ads?

Neither iPerf3 Client & Server nor eMonSys shows ads.

### Which is updated more often, iPerf3 Client & Server or eMonSys?

iPerf3 Client & Server ships an update every 5 days, and eMonSys fortnightly. Most recently, iPerf3 Client & Server was updated on October 9, 2026 and eMonSys on October 6, 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.*