Technical privacy
This page explains, plainly, what Knodl does with your camera and your data. If anything's unclear, write to us.
What gets processed
While you use Knodl, your camera captures video that's analyzed in real time inside your own browser, with a computer-vision model (MediaPipe) running locally. Only numbers get extracted from each frame: where your gaze points, how your head is tilted, whether your eyes are closed. The image itself never becomes a file, never gets uploaded to any server, and is never stored — not even temporarily on your own disk.
What leaves your device
Nothing camera-related: Knodl has no backend that receives video, attention detection is 100% local. Two things do travel over the network. First: analytics events about your session — that you started one, how many times we noticed your attention drift and what general kind (looking away, stepping away, phone), whether you were shown a nudge — never an image, a video, or a facial coordinate. Those events go to Umami, a third-party analytics service; the site also uses Cloudflare Web Analytics, loaded by your browser without cookies. Second: if you choose to leave a review, that text passes through Cloudflare Turnstile (spam filter) and gets forwarded by email via Resend — this only happens if you write a review, not during your focus session. The summary you can email yourself at the end never touches our servers: we draft the message and your own mail app sends it.
What gets stored
Only your preferences (language, your name if you typed one, session length, sensitivity) in your browser's local storage. It never leaves your device, and you can delete it anytime with the "Delete my data from this browser" button inside the app.
Exercising your rights
For questions, corrections, or to request deletion of anything you've sent us (a testimonial, for instance), write to [email protected].
Knodl is not a treatment
Knodl is a focus companion, not a medical device or a treatment for ADHD or any other condition. It doesn't replace evaluation or care from a health professional.