1. Data controller
Arithmos is the controller of personal data processed through arithmos.xyz. The fastest way to reach us is via the contact form.
2. What we collect
- Account data: name, email address, hashed password, profile bio, social link, avatar image (if you upload one), the timestamp at which you accepted these terms, and any settings you configure.
- Generated content: the prompts you submit, the indexes generated from them, your saves, comments, likes and reshares.
- Billing data: a Stripe customer reference if you subscribe; we do not store full card numbers.
- Product analytics: page views, button clicks and error events captured via PostHog. Where possible we proxy these through our own domain so they are not blocked by ad-blockers.
- Server logs: request URL, timestamp, IP address and user-agent for security and debugging. Retained 30 days.
3. Why we use it
To provide and operate the service (contractual necessity); to keep the platform secure and prevent abuse (legitimate interest); to process payments and meet our tax and accounting obligations (legal obligation); and to send service notifications and product updates (legitimate interest, with an unsubscribe option).
5. Retention
Account data is retained while your account is active and for up to 12 months after deletion to handle disputes and meet legal obligations. Server logs are retained for 30 days. Billing records are retained for as long as required by tax law (7 years in the UK).
6. Your rights
Under UK GDPR you can request access to, correction of, or deletion of your personal data; restrict or object to processing; and request portability of your account data. Use the contact form to exercise any of these rights. You can also lodge a complaint with the UK Information Commissioner’s Office.
8. Children
Arithmos is not directed at children under 18 and we do not knowingly collect personal data from anyone under that age.
9. Changes
We may update this policy. Material changes will be notified by email or in-product banner.