Privacy
Last updated 3 August 2026
This website
This site collects nothing. No analytics, no cookies, no tracking pixels, no third-party scripts. It is a static page; our host (Cloudflare) processes standard request logs to serve and protect it, as any host does.
The app
Greylight is built local-first. Your trips, marks, routes and records are stored on your device, in your control. They are not uploaded to our servers — we do not operate accounts or hold your data.
Our design commitment as sharing features arrive: end-to-end encryption, so that anything you choose to share can be read by the people you shared it with and no one else — including us.
If you email us, we keep the correspondence for as long as it is useful to answer you, and nothing more is done with it.