Comparison

Network Toolbox Net security vs CRUMB

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

Head to head
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/

About

CRUMB

Explore and build electronic circuits in an interactive 3D environment. Learn circuit basics, experiment with components, and analyze performance with built-in tools without the risk of damaging real parts.

Highlights
  • Interactive 3D circuit construction
  • Wide selection of electronic components
  • Study transistors and audio filtering
  • Program EEPROMs
  • Built-in oscilloscope and analysis views
  • Prototype analysis before real-world construction
Features
Read full description

CRUMB offers an easy to use and interactive introduction to electronic circuits Fully realised in 3D, you can construct prototype circuits as you would at the workbench without the risk of terminal component failure or the hassle of ordering individual components CRUMB comes with a great selection of components to allow you to jump straight in to creating prototype circuits With the catalogue available, it is possible to study the workings of transistors & audio filtering, all the way to programming an EEPROM to run a basic program For the beginner, it is possible to learn and understand the basics of interactivity, and for the enthusiast it is possible to analyse and perfect prototypes before constructing real world models Using the built in oscilloscope and analysis views, it is possible to see clearly the interaction between components from within the wires themselves Through community feedback and suggestion, there will be many more components and features added. For a full feature list and development schedule please visit the website http://www.crumbsim.com

Screenshots

Network Toolbox Net security4 screens
CRUMB4 screens

Verdict

The call

The clearest difference is price: Network Toolbox Net security at Free against CRUMB's $7.99. Network Toolbox Net security also leads on review sentiment (75% vs 56%) and ratings volume (3.3K vs 138). CRUMB's advantage is in-app purchases (none vs 12) and ads (none vs shown). On rating, device support and iOS requirement 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

Network Toolbox Net security is free to download; CRUMB costs $7.99 up front. Network Toolbox Net security sells 12 in-app purchases, starting at $2.99 per 7 days. CRUMB 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 4.4. That said, the two scores are not equally well evidenced: Network Toolbox Net security has 3.3K ratings behind it against 138, so its average is the more settled of the two. Written reviews point the same way: 75% of Network Toolbox Net security's written reviews are positive against 56% of CRUMB's.

UpkeepUpdate frequency

Network Toolbox Net security ships an update every 2 months, CRUMB weekly. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

Scorecard8 real differences · 3 level
Network Toolbox Net security versus CRUMB: the parameters behind the verdict, then further details
ParameterNetwork Toolbox Net securityCRUMB
PriceFree — better$7.99
Rating4.6 (3.3K ratings) — better4.4 (138 ratings)
Positive reviews75.2% of reviews — better55.6% of reviews
Number of ratings3.3K — better138
Update frequencyEvery 2 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#127 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size152 MB496 MB
Age rating17+4+
DeveloperWHATSTICKER APPS SRLVital Group Limited

Customer experience

Network Toolbox Net security

All ratings3,303 ratings
Positive89.5%
Neutral3.6%
Negative6.9%
Written reviews395 reviews
Positive75.2%
Neutral4.1%
Negative20.8%

CRUMB

All ratings138 ratings
Positive85.5%
Neutral2.9%
Negative11.6%
Written reviews36 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

User reviews

Network Toolbox Net security

From 3.3K App Store ratings

What we love

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

Room to improve

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

CRUMB

From 138 App Store ratings

What we love

  • 👍 Great for beginners
  • 💡 Good for learning new skills
  • ✨ Simple to put things together
  • 🎨 Great graphics
  • 🧩 Plenty of components

Room to improve

  • ❌ Very limited components
  • ❌ Lacks modern components
  • 🐛 Crashing frequently
  • 🐛 App crashes when using corners
  • 🐛 Crashing on Mac

Bugs and 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

CRUMB

Reported bugs

11 issues
  • App crashes when using the “corners” option on jumper wires
  • Experienced some crashing on Mac
  • Component images do not rotate
  • Power rails are backwards related to real life breadboards
  • Program counters (74HC161) do not reset to 0 on a reset signal
Show 6 more
  • 74HC245 enable pin should be labeled active low but it’s not
  • EEPROM sometimes corrupts the data saved in the HEX editor
  • Many components, most commonly the transistor, lock their image in place even if deleted
  • Buttons and switches will react to touching the screen even when not touching the component location
  • Rotation is broken on the app version
  • UI can be a little flaky at times

Requested features

31 requests
  • Implement modern components (TI IC, LTC series)
  • Add 12 segment display
  • Add Arduino and other microcontrollers
  • Add a spot to code Arduino/microcontrollers
  • Allow custom wire colors
Show 26 more
  • Create circuit boards with custom colors
  • Add pre-made circuit boards
  • Ability to create custom electronic components from circuits
  • Improve corner-to-corner wire mode for breadboard/power rail connection
  • Add snap rotations and positions
  • Add CD4511 component
  • Add oscilloscope
  • Add signal generator
  • Add BJT transistors
  • Add op amp
  • Add MOSFETs
  • Add transformers
  • Add relays
  • Add AC power supply
  • Add music player for amplifier learning
  • Add more examples of classic circuits
  • Simulation pausing
  • Add hotkeys to desktop version
  • Add resistance monitoring view
  • Allow push buttons to be placed across rails
  • Add 'Show Pins' view to app version
  • Add schematic feature
  • Add manual
  • Add more functions and components
  • Add more examples
  • PC integration

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
None

CRUMB

No in-app purchases

Questions

Is Network Toolbox Net security free?
Network Toolbox Net security is free to download, with in-app purchases available.
Is CRUMB free?
CRUMB costs $7.99, with no in-app purchases.
Which has better reviews, Network Toolbox Net security or CRUMB?
Network Toolbox Net security is rated higher. Network Toolbox Net security averages 4.6 out of 5 from 3.3K ratings, while CRUMB averages 4.4 from 138 ratings.
Do Network Toolbox Net security or CRUMB have ads?
Network Toolbox Net security shows ads; CRUMB does not.
Which is updated more often, Network Toolbox Net security or CRUMB?
Network Toolbox Net security ships an update every 2 months, and CRUMB weekly. Most recently, Network Toolbox Net security was updated on October 12, 2026 and CRUMB on October 14, 2026.

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