Wintertrace is one piece of software with one job: documenting winter service
operations. The list below is what runs today, not what is planned. Anything
marked Planned or Vision is clearly labelled.
Location data is captured through the free, open-source OwnTracks app on the driver phone — sent directly to your installation over HTTPS, not through any third-party cloud.
iOS and Android, free, open source
Direct phone-to-server HTTPS — no intermediate cloud
Track is locked after operation end (audit integrity)
Temperature, precipitation, and snow depth are fetched automatically at the start and end of every operation from independent providers — and stored permanently with the operation record.
Open-Meteo as the default provider (free, no API key)
Bright Sky (DWD) and MET Norway available via the provider architecture
Every operation is exported as a formal PDF with company header, GPS track as vector graphic, weather data, and photos. Printable, archivable, and intended as documentation in liability cases.
GPS track rendered as SVG, scales without quality loss
Cover page · map page · data page · photo pages
Server-side rendering via DomPDF — no headless Chrome needed
Updates are downloaded in the browser at the admin click and verified against a root key embedded in the code — tampering is mathematically excluded as long as the key is safe.
Ed25519 cryptographic signatures
Root verification key embedded in the application
Manual approval — updates never apply automatically
Upload one small file to your web hosting, open it in your browser, and the installer puts the latest signed Wintertrace core on your webspace. About ten minutes — no FTP client needed.