Snapshots, data logging, and live RF monitoring for Berkeley Varitronics YorkiPro and TransitHound detectors — with offline maps, tamper-evident case files, and no cloud anywhere in the pipeline.
Both editions keep your survey data entirely on your machine and share the same file format — a backup from one restores in the other. They differ in how far the no-network guarantee goes.
The installed app is incapable of network access — there is no HTTP client in the binary, no updater, no analytics, no telemetry. Licensing and even reverse-geocoding run from files shipped inside the installer. Nothing to trust; there is simply no wire to phone home on.
The strongest guarantee — built for evidentiary-grade work.
Runs in Chrome or Edge with no application server at all: your detector talks to the tab over Web Serial, and everything is stored in an SQLite database inside the browser's private storage on your computer. No account, no upload, no analytics — the site doesn't even load a font from a third party.
One honest caveat: the app's code is delivered by our host each visit. If your work demands that nothing is ever fetched, use the desktop edition.
| Desktop | Web | |
|---|---|---|
| Install | Windows installer / macOS DMG | None — open the page (installable as an app) |
| Network behaviour | None, structurally — no HTTP client in the binary | Loads app code from our host; your data makes zero requests |
| Where your data lives | A single SQLite file in your user profile | The same SQLite format, in this browser's private storage |
| Backups |
Ordinary .sqlite files — fully interchangeable between editions
|
|
| Updates | Manual — you install new versions yourself | On reload, never mid-session |
| Hardware support | Any OS serial port | Web Serial — Chrome / Edge on desktop |
| Licensing | Optional — the app runs unlicensed | Demo free for everyone; connecting real hardware needs a license |
| Best for | Evidentiary work, air-gapped machines, standard kit | Trying it out, quick fieldwork on a borrowed machine |
Detector → USB → your browser tab → a database file on your disk. That's the entire pipeline — there is no server side to breach, subpoena, or leak.
Pull every stored screen-mode snapshot and data-logging file from a YorkiPro, deduplicated across re-syncs, with per-record notes and exports.
Real-time signal streaming with per-band thresholds, rising/falling delays, and a detection log that records every threshold crossing.
GPS-tagged records plotted on a bundled world map and reverse-geocoded against an on-device city database — no tile servers, no lookups.
Projects copy evidence records and keep a hash-chained custody log — any later edit or deletion breaks the chain and is flagged.
Zero network access, structurally. Windows 10+ and macOS (Intel & Apple Silicon) installers.
Nothing to install. The demo is free for everyone; connect your own detector with a license.
Desktop: one SQLite file in your user profile
(com.ohmsense.yorkipro). Web: the same SQLite format inside your
browser's origin-private file system — on your disk, readable only by this site,
never transmitted. Use Settings → “Protect data from eviction” and export backups
regularly; clearing browsing data deletes browser storage.
Yes — backups are ordinary .sqlite files with an identical schema.
Export from one edition and restore in the other; projects, custody logs,
watchlists and settings all carry over, and custody hash-chains verify on both
sides.
Connecting hardware needs the Web Serial API: Chrome or Edge on Windows, macOS, or
Linux. Firefox and Safari can run the demo but cannot talk to a detector. On
Brave, enable Web Serial in brave://settings. Mobile browsers are
demo-only.
The desktop app runs unlicensed. In the web edition the demo devices are free for everyone, and connecting a real detector requires a license — activate at ohmsense.com.au/activate with your device serial, then paste the license in Settings. Verification happens entirely in your browser.
After your first visit it installs as a PWA and opens offline — device syncs, maps, geocoding and case files all run locally. Updates apply only when you reload, never mid-session.
Because “we don't send your data anywhere” is a promise, while “this binary contains no networking code” is a property. The web edition holds the first; the desktop edition holds the second. For court-bound or air-gapped work, use desktop.