CalcRef

Privacy

CalcRef is local-first. Favorites, recent formula history, and quiz results stay in this browser storage (key calcref:state) unless you export them. There are no accounts and no cloud sync.

Analytics

CalcRef carries no advertising trackers and no third-party tracking pixels. When privacy-friendly analytics are enabled for a deployment they use Cloudflare Web Analytics, which is cookieless and does not fingerprint visitors or track you across other sites.

• No cookies are set for analytics.
• No cross-site or cross-device profile is built.
• Aggregate page metrics only — never your saved formulas or quiz answers.

Payments

CalcRef is free to use. If you choose to buy Premium, checkout is handled by RevenueCat (Web Billing) and Stripe. Your card details are entered directly into their secure checkout and never touch CalcRef's own code.

• An anonymous RevenueCat purchase id is stored in this browser (calcref.rc.appUserId) so your Premium access is recognised on this device.
• Keep your receipt email — it is how you manage or recover access.
• Without a configured billing key the app ships fully free, with no purchase surfaces at all.