Comparison

Field Strength Estimator vs Network Toolbox Net security

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Field Strength Estimator

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
Read full description

The program Field Strength and Power Estimator calculates power flux density, electric and magnetic field strength from the transmitted power, associated frequency and gain of the transmitting antenna. Additionally the input power into a receiver with 50 Ohm input impedance is calculated from the gain of the receiving antenna. The program automatically converts power flux density into electric and magnetic field strength. Depending on the transmitted frequency, various parameters influence the received power and field strength, such as non-line-of-sight propagation, changes in polarisation, reflections, and multi-path propagation affect the true values. Additionally antenna VSWR and cable losses have to be considered. The program Field Strength and Power Estimator does not consider these impairments. It assumes conditions, that are close to the best possible theoretical values. This is why we say the program is an Estimator, not a Calculator. This application is based on the application note: "1MA85: Field Strength and Power Estimator" by Rohde & Schwarz GmbH & Co. KG ( http://www.rohde-schwarz.com/appnote/1MA85 )

About

Network Toolbox Net security

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
Read full description

*** THE ORIGINAL - NetworkToolbox *** Read the Manual at: https://www.networktoolbox.de/ios-manual/ This App with its 50+ individual Tools helps to analyse local or public networks for security issues or wrong configurations. It provides various scanning options such as WiFi Network IP scanning, Port scanning and integrates the SHODAN scan engine, Security exploit tests and more. Feature summary: DEVICE INFORMATION ■ Device and public IP Address ■ Network interfaces (WiFi, 3G/4G) SHODAN AND MORPHEUS SEARCH ■ Expose online devices ■ Search by keyword, country, port, network, hostname MAP SEARCH ■ Search and expose online devices for on a given location NS-LOOKUP with DOMAIN INFORMATION ■ Provides information for a certain domain or ip ■ Provide information about the number of attacks (ISC) ■ Location of IP or Host display on a map ■ DNS records such as MX, A, TXT etc. WIFI NETWORK SCAN ■ Discover all devices on your network ■ Including IP, MAC, Vendor, Network Name PING ■ Ping IP or domain ■ Show Errors and RTT ■ Display results graphically WHOIS ■ Find out who is behind a certain domain DNS ■ Query ANY! DNS Server ■ See DNS record information such as A,TXT,CNAME,MX,SOA etc. ■ See and compare DNS Server response times VISUAL TRACEROUTE ■ Analyze how packets get to their destination SOCKETS ■ Socket analysis and terminal tool ■ Predefined protocols for Telnet, FTP, HTTP, POP3 and IMAP ■ Inspect server responses ■ Send arbitrarily data to the server FTP and SFTP CLIENT ■ Browse remote directory tree ■ Direct file viewing ■ File and directory operations ■ Upload and download of multiple files to device ■ Default password list check of FTP server ■ Public / Private Key support (New!) SSH CLIENT ■ Terminal client for SSL ■ Default password list check of server SFTP CLIENT ■ Same functionality as FTP MAC ADDRESS DB ■ Find out which vendor is responsible for which MAC address and v/v IP CALCULATION ■ Calculate net-masks, first-,last- addresses etc. HTTP BROWSER ■ Site Default password check ■ Possibility to select user agents from Blackberry over Firefox, IE, Safari and iOS ■ Display source code, plain text or hirachically browse XML SPIDER ■ Crawl website and collect all contained links ■ Analyze robots.txt ■ Both, websites and disallows robots content can be further analyzed BLUETOOTH ■ Scan and reveal Bluetooth LE devices CERTIFICATES ■ Inspect Server (e.g. HTTPS) certificates in a readable format BONJOUR and UPnP ■ Scan and discover Bonjour or UPnP services MAIL SERVER CHECK ■ Analyze issues with your mail settings LOCAL FILES ■ Handle files downloaded via FTP or SFTP or HTTP (New!) ■ File and directory operations ■ File viewer (PDF, Text, Image, HTML) ■ Open files in other apps, installed on your device ■ Send file via E-Mail HELP TEXTS ■ Each tool has a detailed description of their purpose and how to use Subscribe to access to premium app features; subscription details are the following: • Length: weekly, monthly, yearly • Your payment will be charged to your iTunes Account as soon as you confirm your purchase • You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase • Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period • The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period • When cancelling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded • Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Field Strength Estimator2 screens
Network Toolbox Net security4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 2 level
Field Strength Estimator versus Network Toolbox Net security: the parameters behind the verdict, then further details
ParameterField Strength EstimatorNetwork Toolbox Net security
PriceFreeFree
Rating4.3 (4 ratings)4.6 (3.4K ratings) — better
Positive reviews100.0% of reviews — better75.3% of reviews
Number of ratings43.4K — better
Update frequencyEvery 13 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size72 MB152 MB
Age rating4+17+
DeveloperRohde & Schwarz GmbH & Co. KGWHATSTICKER APPS SRL

Customer experience

Field Strength Estimator

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Network Toolbox Net security

All ratings3,303 ratings
Positive89.5%
Neutral3.6%
Negative6.9%
Written reviews396 reviews
Positive75.3%
Neutral4.0%
Negative20.7%

Bugs and requests

Field Strength Estimator

Not enough reviews yet to summarise bugs or requests.

Network Toolbox Net security

Reported bugs

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

Requested features

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

In-app purchases

None

Field Strength Estimator

No in-app purchases

12 purchases

Network Toolbox Net security

Subscriptions12
  • Wekkly Premium7 Days trial$2.997 Days
  • Weekly premium$2.997 Days
  • Weekly premium$4.997 Days
Show 9 more
  • Weekly premium7 Days trial$4.997 Days
  • Monthly premium7 Days trial$9.991 Month
  • Monthly premium$9.991 Month
  • Yearly premium7 Days trial$29.991 Year
  • Yearly premium$29.991 Year
  • Yearly premium7 Days trial$49.991 Year
  • Yearly premium$49.991 Year
  • Yearly premium7 Days trial$79.991 Year
  • Yearly premium$79.991 Year

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.

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