# Field Strength Estimator vs Network Toolbox Net security

The clearest difference is in-app purchases: Field Strength Estimator at none against Network Toolbox Net security's 12. Field Strength Estimator also leads on ads (none vs shown) and review sentiment (100% vs 75%). Network Toolbox Net security's advantage is update cadence (every 2 months vs every 13 months) and ratings volume (3.4K vs 4). On price and device support there is nothing between them.

Both are free to download. Network Toolbox Net security sells 12 in-app purchases, starting at $2.99 per 7 days. Field Strength Estimator asks for nothing beyond the download.

Network Toolbox Net security holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Network Toolbox Net security has 3.4K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 100% of Field Strength Estimator's written reviews are positive against 75% of Network Toolbox Net security's, so the app with the better star average is not the one people write more warmly about.

Field Strength Estimator ships an update every 13 months, Network Toolbox Net security every 2 months. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Field Strength Estimator | Network Toolbox Net security |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/field-strength-estimator/id364229792/reviews) | **[4.6 (3.4K ratings)](https://appshunter.io/ios/app/network-toolbox-net-security/id651691453/reviews)** |
| Number of ratings | 4 | **3.4K** |
| Positive reviews | **100.0% of reviews** | 75.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 72 MB | 152 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rohde & Schwarz GmbH & Co. KG](https://appshunter.io/developer/364229795) | [WHATSTICKER APPS SRL](https://appshunter.io/developer/1784779333) |

## What reviewers say

### Field Strength Estimator

[App page](https://appshunter.io/ios/app/field-strength-estimator/id364229792)

This app estimates field strength and power flux density based on transmitted power, frequency, and antenna gain. It calculates received power at a receiver and automatically converts power flux density to electric and magnetic field strength. It provides theoretical best-case values, not accounting for real-world propagation impairments.

**Highlights:** Calculates power flux density, Estimates electric and magnetic field strength, Calculates received power, Considers antenna gain and transmitted power, Assumes theoretical best-case conditions

**Features:** macOS Compatibility

**In-app purchases:** none


### Network Toolbox Net security

[App page](https://appshunter.io/ios/app/network-toolbox-net-security/id651691453)

Analyze local and public networks for security issues and misconfigurations with over 50 tools. Features include IP scanning, port scanning, exploit tests, and SHODAN integration to expose online devices.

**Highlights:** WiFi Network IP scanning, Port scanning, SHODAN scan engine, Security exploit tests, Device information, NS-Lookup with domain info, Visual Traceroute

**Features:** Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wekkly Premium | $2.99 | per 7 days |
| Weekly premium | $2.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Monthly premium | $9.99 | per month |
| Monthly premium | $9.99 | per month |
| Yearly premium | $29.99 | per year |
| Yearly premium | $29.99 | per year |
| Yearly premium | $49.99 | per year |
| Yearly premium | $49.99 | per year |
| Yearly premium | $79.99 | per year |
| Yearly premium | $79.99 | per year |

**What reviewers like**

- 👍 Comprehensive networking tools
- 🚀 Powerful and efficient
- 💡 Excellent learning resource
- 🔒 Helps identify security issues
- 👍 User-friendly interface

**What reviewers complain about**

- 🔒 Privacy concerns with new ownership
- 💰 Switched to subscription model
- 🐛 Stability issues after updates
- 💰 Expensive subscription fees
- 🔒 Tracking and data collection

**Reported bugs**

- Bluetooth configuration issues
- Unreliable website links
- Freezing and crashing on certain devices

**Requested features**

- Dark mode option
- More advanced network scanning capabilities
- Improved documentation and tutorials
- Restore previous one-time purchase model


## Frequently asked questions

### Is Field Strength Estimator free?

Field Strength Estimator is free to download, with no in-app purchases.

### Is Network Toolbox Net security free?

Network Toolbox Net security is free to download, with in-app purchases available.

### Which has better reviews, Field Strength Estimator or Network Toolbox Net security?

Network Toolbox Net security is rated higher. Field Strength Estimator averages 4.3 out of 5 from 4 ratings, while Network Toolbox Net security averages 4.6 from 3.4K ratings.

### Do Field Strength Estimator or Network Toolbox Net security have ads?

Network Toolbox Net security shows ads; Field Strength Estimator does not.

### Which is updated more often, Field Strength Estimator or Network Toolbox Net security?

Field Strength Estimator ships an update every 13 months, and Network Toolbox Net security every 2 months. Most recently, Field Strength Estimator was updated on October 12, 2026 and Network Toolbox Net security on October 20, 2026.

---

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