On-device mode
Install Preventia, and keep it entirely on your device.
On-device mode reads and analyzes your lab report locally in this browser — nothing is uploaded, and it keeps working with no internet connection at all.
On-device modeAnalyze on this device only. Nothing is uploaded — your report and history are saved locally in this browser.
iPhone / iPad
Open this site in Safari, tap the Share icon, then "Add to Home Screen".
Android
Open this site in Chrome, tap the menu (⋮), then "Install app" or "Add to Home screen".
Desktop
In Chrome or Edge, click the install icon in the address bar, or the browser menu → "Install Preventia".
Works with no connection
Once installed and opened at least once, Preventia keeps working in airplane mode: uploading a PDF, viewing your report, and logging daily readings all work offline. Only the optional "Allow cloud AI" toggle needs a connection.
Your file never leaves this device
On-device mode runs entirely in this browser — your file is never sent anywhere.
- Never leaves this deviceOn-device mode reads and analyzes your file locally — nothing is uploaded anywhere.
- No network request madeThe analysis runs entirely in this browser, including offline with no connection.
- No account neededNothing to sign up for — results are saved locally in this browser only.
- You stay in controlExport your local results any time as a backup, or clear them from this device.