Privacy Policy
Last updated: June 5, 2026
PreBell ("we", "us", "our") is operated by Francesko Jemini, a sole proprietor in the State of Michigan, United States, and runs the PreBell website and web application. This policy explains what data we collect, how we use it, and your rights.
What we collect
We collect only what is necessary to operate the service:
- Access tokens: we generate and store a secure access token when you run a no-email analysis, start a free trial, or purchase a subscription. This token is what unlocks the app. We do not store passwords.
- Email address: if you start a free trial or subscribe, we store your email so we can send your access token and let you recover it later. We do not sell it, and we do not use it for marketing without your consent.
- Chart images: your uploaded chart is sent to the Anthropic API for analysis. We hold it only while that analysis is queued and running, then discard it. Anthropic's data handling is governed by their privacy policy.
- IP address: we record it against short-lived daily counters, and on no-email trial records, to stop the free tier being abused. It is not used for tracking or advertising.
- Usage data: we use browser localStorage to store your access token locally. No usage data is sent to our servers beyond what is necessary to validate your token and run the analysis.
Third-party services
- Stripe: processes payments. We do not store your card details. Stripe's privacy policy governs payment data.
- Anthropic: powers the chart analysis. Chart images are sent to Anthropic's API. We do not keep a copy once your analysis finishes.
- Netlify: hosts this website. Netlify may collect standard server logs (IP address, request timestamps).
- Resend: sends transactional emails (access token delivery). We do not use this for marketing without your consent.
- Google Fonts: used for typography. Google may log font requests.
- Cloudflare Web Analytics: privacy-focused page analytics. It does not use cookies and does not fingerprint visitors.
How we use your data
- To deliver your access token and provide the chart analysis service
- To validate your subscription status on each session
- We do not sell your data to third parties
- We do not use your data for advertising
- We do not train AI models on your chart images or strategy text
Your rights
You may request access to, correction of, or deletion of your personal data at any time by emailing support@prebell.net. We will respond within 30 days. If you are in the EU/UK (GDPR) or California (CCPA/CPRA), you have rights to access, correct, port, or delete your personal data, and we do not sell it.
To cancel your subscription, use the billing portal in the app — it's instant and online. To revoke your access token or request deletion of your data, email us at the same address.
Data retention
Access token records are retained while your access is active. Chart images are held only while your analysis is queued and running, then discarded, and we do not keep a copy afterward. Rate-limit counters expire daily. If you cancel and request deletion, we will remove your token record within 30 days.
Cookies and local storage
We do not use cookies. We use browser localStorage to store your access token so you don't need to re-enter it each session. This data stays in your browser and is never transmitted to our servers except as an authorization header when you run an analysis.
Changes to this policy
We may update this policy as the product evolves. Significant changes will be communicated via email to active subscribers.
Contact
Questions about this privacy policy? Email us at support@prebell.net. The founder answers personally.