Privacy & saved data

Browsing and guest saves

You can research stocks without signing in. Watchlists are stored in this browser. Guest portfolios, research notes, custom frameworks, theme preferences, and some draft settings also use browser storage. They may be lost when you clear site data, use private browsing, or switch devices.

Stock searches and requests for financial data are sent to the app’s servers to retrieve results. Portfolio calculations can send the requested tickers to the app’s data endpoints. Do not treat information entered into a web service as offline-only.

Optional sign-in and cloud saves

Google sign-in is handled through Supabase Auth. The app uses account identity, including your email and profile information, to display your session and associate supported cloud saves with your account. Session cookies keep you signed in.

Signed-in portfolios and saved screeners can be stored in Supabase. Portfolio CSV imports are parsed in the browser; holdings saved to a signed-in portfolio can then sync to your account. Signing out does not necessarily erase local browser data. On a shared device, review and clear saved data before leaving.

Hosting, analytics, and error diagnostics

The app runs on Vercel and includes Vercel Web Analytics. Hosting and service providers process request information to deliver and operate the app. See Vercel’s analytics privacy information and Supabase’s privacy policy for their handling of service data.

The app’s browser-error reports contain a coarse page category and an error category. They do not include error text, query strings, ticker symbols, portfolio holdings, or account identifiers. These reports are rate limited and recorded in server logs to help diagnose broken experiences.

Optional AI features

Approved private-preview users can request AI narratives or debates. Those requests send the selected stock or market context to Anthropic for generation. Public stock research does not require using these features.

Manage your information

Use the app’s remove controls to manage saved items, and your browser’s site-data controls to clear local storage and cookies. For questions about account data or a deletion request, contact info.studio.pinball@gmail.com. Never email passwords, access tokens, or full private portfolio files.