Last updated: April 23, 2026 · Madmar Labs LLC
This Cookie Policy explains how Madmar Labs LLC("we," "us," "our"), doing business as Rolling Line, uses cookies and similar technologies when you visit our website at https://rollingline.app or use our mobile application (collectively, the "Services"). It explains what these technologies are and why we use them, as well as your rights to control our use of them.
Cookies are small data files that are placed on your device when you visit a website. Cookies are widely used by website owners to make their websites work, or to work more efficiently, as well as to provide reporting information.
Cookies set by the website owner (in this case, Madmar Labs LLC) are called "first-party cookies." Cookies set by parties other than the website owner are called "third-party cookies." Third-party cookies enable third-party features or functionality to be provided on or through the website (such as authentication, fraud prevention, and session management).
We also use related technologies such as local storage, session storage, and web beacons. In this Cookie Policy, we use the word "cookies" to refer to all of these technologies.
Rolling Line uses only strictly necessary cookies. We do not use cookies for advertising, marketing analytics, retargeting, or cross-site tracking. Specifically, we use cookies to:
The specific cookies served through the Services and the purposes they perform are described below. Because cookie names, values, and expirations can change from time to time as our third-party providers update their systems, this list describes the functional categories rather than every specific cookie name.
| Provider | Purpose | Type |
|---|---|---|
| Clerk | Authentication session tokens, device verification, and security. Required to keep you signed in and prevent unauthorized access. | Strictly necessary |
| Vercel | Hosting and edge routing. Used to direct your requests to the nearest server and protect against abuse. | Strictly necessary |
| Next.js / Rolling Line | Session state, CSRF protection, and preference storage (such as time-format toggle). | Strictly necessary |
| Stripe (checkout flows only) | Fraud prevention and payment session security when you enter a payment method. Only set during checkout, not on general browsing. | Strictly necessary |
We want to be explicit about what Rolling Line does not do:
If we ever add analytics or other non-essential cookies in the future, we will update this Cookie Policy and, where legally required, seek your consent before such cookies are set.
The length of time a cookie will stay on your device depends on whether it is a "persistent" or "session" cookie. Session cookies will remain on your device only until you stop browsing. Persistent cookies stay on your device until they expire or are deleted.
The cookies used by Rolling Line are typically session cookies or short-duration persistent cookies that expire within a few days to a few weeks, with authentication cookies generally persisting only as long as needed to keep you securely signed in.
You have the right to decide whether to accept or reject cookies. Because the cookies we use are strictly necessary for the Services to function, we do not currently provide an in-app cookie preferences center. If you disable or block cookies in your browser:
Most web browsers allow some control of most cookies through browser settings. To find out more about cookies, including how to see what cookies have been set, visit www.aboutcookies.org or www.allaboutcookies.org.
Find out how to manage cookies on popular browsers:
Some browsers send a "Do Not Track" (DNT) signal or a Global Privacy Control (GPC) signal to websites. Because we do not sell or share personal information, and because the cookies we use are strictly necessary for the Services to function, these signals do not materially change what we do with your information. If we ever add analytics or cookies that could be considered "sale" or "sharing" under applicable privacy laws, we will honor these signals where required.
We may update this Cookie Policy from time to time in order to reflect changes to the cookies we use or for other operational, legal, or regulatory reasons. Please re-visit this Cookie Policy regularly to stay informed about our use of cookies and related technologies. The date at the top of this Cookie Policy indicates when it was last updated.
If you have any questions about our use of cookies or other technologies, please contact us at support@rollingline.app or by post at:
Madmar Labs LLC
8735 Dunwoody Pl, STE R
Atlanta, GA 30350
United States