Cookies & Local Storage
Last updated: October 1, 2026
Short version
COFOS does not use tracking cookies, advertising cookies, or third-party marketing/analytics cookies. This notice exists for transparency and completeness, not because COFOS relies heavily on cookies — it largely doesn't.
What we actually use
On mobile (iOS/Android): there are no cookies at all. Your session is kept alive using your device's OS-level secure storage (the iOS Keychain or Android Keystore) — a security mechanism, not a tracking one. See our Security & Data Protection Policy for detail.
On the web version of COFOS: the App uses browser local storage (not cookies) to keep you logged in between visits, in essentially the same way as the mobile app's secure storage. This is strictly necessary for the App to function — without it, you would need to log in again on every page load. It is not used to track you across other websites, and no advertising or analytics cookies are set.
Third-party cookies
We do not embed any third-party advertising, tracking, or marketing pixels/cookies in the App. Our analytics provider (PostHog) and error-monitoring provider (Sentry) are integrated at the application level, not via browser cookies, and are described fully in our Privacy Policy.
When you pay for your subscription you leave COFOS for Flitt's payment page (pay.flitt.com), which is operated by Flitt and may use its own cookies under its own policy.
Your choices
Because COFOS doesn't rely on cookies for tracking, there isn't a cookie-consent banner with categories to opt in or out of. If you clear your browser's local storage on the web version, you will simply be logged out and need to sign in again — there is no tracking data to "opt out of" beyond that.