Cookie Policy

A cookie is a small text file stored on your device by your browser. We use cookies and similar storage technologies (localStorage, sessionStorage) to run the site, remember your preferences, and — for free users — to display advertisements.

Essential storage (always on)

• localStorage — portfolio state. Your last simulator configuration (assets, weights, range) is kept locally so you do not have to rebuild it on every visit.
• localStorage — cookie_consent. Records your cookie preference so the consent banner does not reappear on every page load.
• sessionStorage — API cache. Temporarily caches market data responses for the current browsing session to reduce latency and avoid hitting rate limits.
• Authentication cookie (only if you sign in). Stores a session token so you remain logged in.

Advertising cookies (require consent)

We display ads to free users via Google AdSense. AdSense and Google's ad partners may set the following cookies:

• __gads, __gpi — measure ad delivery and frequency capping.
• IDE, NID (set on doubleclick.net / google.com) — used for ad personalisation and conversion measurement.
• Additional cookies set by individual advertisers under Google's certified ad-tech partners list.

Read Google's full description at policies.google.com/technologies/cookies.

How to opt out

• Click "Manage Preferences" in our cookie banner (or revisit this page and clear your cookie_consent entry to make the banner reappear).
• Use Google's controls at adssettings.google.com to disable personalised ads across Google services.
• Configure your browser to block third-party cookies (Settings → Privacy in most browsers).

Pro users

If you have unlocked Pro, no advertising cookies are set on your behalf and the AdSense script is not loaded.

For broader privacy details see our Privacy Policy.