Legal
Effective: [DATE]
Signstr is a product of Gridmark Technologies Ltd, a company registered in England and Wales (company number [NUMBER]). Registered address: [REGISTERED ADDRESS].
The Signstr app does not collect, transmit, or store any personal data. Your private key (nsec) is encrypted locally on your device using the iOS Secure Enclave. We never see it. We never have access to it.
If you purchase a NostrKey card, we collect the minimum information needed to fulfil your order: your name, shipping address, email address, and payment details. Payment is processed by Stripe or BTCPay Server. We do not store your card number.
This website does not use cookies. No analytics. No tracking pixels. No third-party scripts beyond Google Fonts for typography.
Payment processing is handled by Stripe (card payments) and BTCPay Server (Bitcoin payments). Stripe's privacy policy applies to card transactions. BTCPay Server is self-hosted and does not share data with third parties.
The website is hosted on Cloudflare Pages. Cloudflare may process basic access logs (IP addresses, request headers) as part of their hosting service.
If you have placed an order and wish to access, correct, or delete your personal data, contact us at support@signstr.com.
The NostrKey card stores your Nostr private key on a secure element chip. This data is protected by your PIN and is not accessible to us, to Signstr, or to any third party. If you lose your PIN and exhaust all attempts, the card is permanently locked. There is no recovery.
We may update this policy. Changes will be posted on this page with an updated effective date.
support@signstr.com