Freedom251 › Wi-Fi Analyzer Software
iStumbler
What iStumbler is
iStumbler is a macOS tool for discovering Wi-Fi networks, Bluetooth devices, Bonjour services, location information, and spectrum use. Its Wi-Fi view lists visible networks, identifies network type and encryption status, graphs signal and noise over time, and can open a connection monitor. Bluetooth tools show connected and discoverable devices and provide controls for setup, pairing, browsing, and file transfers. Bonjour browsing supports service types, host names, and wide-area services. The channel tool maps usage across 2.4 and 5 GHz spectrum, with ratings, regulatory information, and scan times. Location features can show discovered Wi-Fi network locations, optionally track computer movement, and export data and tracks to Google Earth. With Oscium’s WiPry 5x, the spectrum analyzer shows real-time 2.4 and 5 GHz activity in a waterfall view. CSV logs cover Wi-Fi, Bluetooth, Bonjour, and location information. The listed price is $14.99, paid once for all computers you own. The homepage says version 12.0.x crashes at launch on macOS Monterey and that the app is currently off-sale on the Mac App Store.
Who it suits
iStumbler is for Mac users who need to inspect nearby wireless networks, Bluetooth devices, Bonjour services, or spectrum activity. Its location export and CSV logging may suit users who want to review or analyze collected data.
What it does well
- Graphs Wi-Fi signal and noise over time.
- Supports Bluetooth setup, pairing, browsing, and file transfers.
- Exports location data and movement tracks to Google Earth.
- Produces CSV logs for several discovery categories.
- Listed purchase covers all computers you own.
What to know first
- Only described for macOS.
- Currently off-sale on the Mac App Store.
- Version 12.0.x crashes at launch on macOS Monterey.
- Release 103 is dated 14 November 2017.
Limits
There is no free plan. The homepage says the app is currently off-sale on the Mac App Store, and version 12.0.x crashes at launch on macOS Monterey.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| iStumbler | For all the computers that you own | $14.99, paid once |
As istumbler.net lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Open the iStumbler website
- Use a Mac running macOS
- Find iStumbler in the Mac App Store when available
- Pay 14.99 USD once for all computers you own
- Optionally connect Oscium WiPry 5x for spectrum analysis
Verdict
iStumbler offers several discovery and logging tools for macOS, but its current availability and Monterey launch issue are important constraints. Check those notices before considering the listed $14.99 as a one-time purchase.
Questions
What does iStumbler discover?
It investigates Wi‑Fi networks, Bluetooth devices, Bonjour services, location information, and spectrum usage.
How much does iStumbler cost?
The iStumbler plan is $14.99, paid once for all computers that you own.
Which platforms are supported?
The maker describes iStumbler as software for macOS and sells it for Mac computers through the Mac App Store.
Can it export data?
Yes. It can output CSV logs for Wi‑Fi networks, Bluetooth devices, Bonjour services, and location information, and export location and movement tracks to Google Earth.
Does it need special spectrum hardware?
Its spectrum analyzer supports Oscium’s WiPry 5x and displays real-time 2.4 and 5 GHz activity.
Facts from iStumbler's own pages
- Bluetooth
- It lists connected and discoverable Bluetooth devices and provides controls to set up, pair, browse and send files to devices. · istumbler.net, 8 Oct 2026
- Bonjour
- It supports forward browsing by service type, reverse browsing by host name and wide-area Bonjour browsing. · istumbler.net, 8 Oct 2026
- Channel analysis
- Its channel tool provides a usage grid and ratings for 2.4 and 5 GHz spectrum, with channel ratings, regulatory information and scan times. · istumbler.net, 8 Oct 2026
- Current availability notice
- The homepage says version 12.0.x crashes at launch on macOS Monterey and that the app is currently off-sale on the Mac App Store. · istumbler.net, 8 Oct 2026
- Location
- The location tool can show discovered Wi-Fi network locations, optionally track computer movement and export location data and movement tracks to Google Earth. · istumbler.net, 8 Oct 2026
- Logging
- It can output CSV logs of Wi-Fi networks, Bluetooth devices, Bonjour services and location information for spreadsheet analysis. · istumbler.net, 8 Oct 2026
- Maker
- iStumbler Labs says it is operated by Alf Watt and produces software for macOS, iOS, tvOS and the Web. · istumbler.net, 8 Oct 2026
- Platform limitation
- The maker describes iStumbler as a tool for macOS and sells it for Mac computers through the Mac App Store. · istumbler.net, 8 Oct 2026
- Purpose
- iStumbler is a macOS wireless discovery tool for investigating Wi-Fi networks, Bluetooth devices, Bonjour services, location information and spectrum usage. · istumbler.net, 8 Oct 2026
- Release status
- The changes page lists Release 103 dated 14 November 2017 and describes its additions including a Live Map, Bluetooth LE support and TouchBar support. · istumbler.net, 8 Oct 2026
- Spectrum hardware support
- The spectrum analyzer supports Oscium’s WiPry 5x and displays real-time 2.4 and 5 GHz spectrum in a waterfall view. · istumbler.net, 8 Oct 2026
- Support
- The manual directs users with questions or bug reports to the FAQ and Bug Reporter and lists [email protected] as the support contact. · istumbler.net, 8 Oct 2026
- Wi-Fi inspection
- It lists visible wireless networks, indicates network type and encryption status, graphs signal and noise over time, and can open a connection monitor for a network. · istumbler.net, 8 Oct 2026
Where iStumbler stands on Freedom251
- Wi-Fi Analyzer Software#24 of 29
- Network Discovery Software#30 of 35