SkeinBook · Effective March 12, 2026
SkeinBook is built on a simple principle: your patterns are yours. This policy explains what information we collect, why we collect it, and how we handle it. We've written it in plain English because we think you deserve to understand it.
SkeinBook is developed by Timothy Askew. You can reach us at hello@skeinbook.app with any questions about this policy.
Email address
When you activate SkeinBook you provide an email address. We use this to identify your account, link the app across multiple devices, and contact you about important updates. We do not use it for marketing without your explicit consent.
Beta key
During the beta period, you activate the app with a beta key we provide. We record which key was used to create your account for support and access management purposes.
Device information
We record your device platform (Windows or macOS), app version, and a randomly generated device ID. This helps us provide support and understand which versions of the app are in use.
Pattern metadata (non-Ravelry patterns only)
When you import a non-Ravelry pattern and AI extraction is enabled, you will be asked whether to contribute anonymized metadata (title, designer, yarn weight) to a shared community cache. This is optional. If you decline, your pattern is still analyzed — the result is just not shared. Ravelry data is never included in this cache under any circumstances.
| Information | Why We Collect It |
|---|---|
| Email address | Account identity, device linking, critical app updates |
| Beta key | Access management, support |
| Device info | Support, compatibility, update targeting |
| Pattern metadata (non-Ravelry) | Shared extraction cache to reduce AI processing costs |
We do not use your information for advertising. We do not sell your information to third parties. Ever.
On your device
Your pattern files, your complete pattern library database, your Ravelry data, and your OAuth tokens are stored locally on your computer in a SQLite database. We cannot access this data.
On our servers
Your email address, device information, and account details are stored on Supabase, a database service with servers located in the United States (AWS us-east-1, Northern Virginia). Non-Ravelry pattern metadata may be stored in our shared cache, also on Supabase.
API requests are processed via Cloudflare Workers, a globally distributed edge network. Request data may be processed in any region where Cloudflare operates.
If you are located in the European Union, by using SkeinBook you consent to your account data being transferred to and stored on servers in the United States.
SkeinBook uses the following third-party services:
Supabase
Stores your account information and shared pattern metadata cache. Servers located in AWS us-east-1, Northern Virginia, USA. Supabase Privacy Policy
Anthropic Claude
Pattern text is processed via SkeinBook's secure API proxy. No API key is required from users. Text snippets are anonymized before processing — no filenames or personal information are included. Anthropic Privacy Policy
Cloudflare
Our API requests are processed through Cloudflare Workers, a globally distributed edge network. Cloudflare may log request metadata for security purposes. Cloudflare Privacy Policy
Sentry
If you opt in to crash reporting, anonymized crash data is sent to Sentry to help us fix bugs. No personal information or pattern data is included in crash reports. Sentry Privacy Policy
Ravelry
If you connect your Ravelry account, SkeinBook uses Ravelry's API to sync your purchased pattern library. Your Ravelry OAuth token is stored locally on your device only and is never sent to SkeinBook's servers. Ravelry Privacy Policy
Paddle
If you purchase a SkeinBook license, payment is processed entirely by Paddle. SkeinBook never sees or stores your payment information. Paddle Privacy Policy
SkeinBook complies with the Ravelry API Terms of Service. Specifically:
Regardless of where you are located, you have the right to:
Access your data
Email hello@skeinbook.app to request a copy of the account information we hold about you.
Delete your account
Email hello@skeinbook.app with the subject "Delete my account" from the email address associated with your account. We will delete your account and all associated data within 30 days. Your local pattern library on your device is not affected — only your account data on our servers is removed.
Correct your information
If your email address changes, contact hello@skeinbook.app and we will update your account.
Withdraw consent
You can disable AI metadata extraction at any time in Settings. When disabled, no pattern text is sent to Anthropic and no metadata is added to the shared cache.
EU/EEA residents
You have additional rights under GDPR including the right to data portability and the right to lodge a complaint with your local supervisory authority.
California residents
Under CCPA, you have the right to know what personal information we collect, the right to delete it, and the right to opt out of sale (we do not sell personal information).
| Data | Retention Period |
|---|---|
| Active account data | Retained while your account is active |
| Deleted account data | Purged within 30 days of deletion request |
| Inactive accounts (no activity, no license, 12+ months) | Email notification sent, then purged after 30 days |
| Shared pattern metadata cache | Retained indefinitely (contains no personal information) |
| Crash reports (Sentry) | 90 days |
SkeinBook is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe we have inadvertently collected such information, please contact hello@skeinbook.app and we will delete it promptly.
We may update this policy as SkeinBook evolves. When we make significant changes we will notify you by email and update the "Last updated" date at the top of this page. Continued use of SkeinBook after changes are notified constitutes acceptance of the updated policy.
Questions about this privacy policy or how we handle your data:
SkeinBook is not affiliated with Ravelry, Etsy, or any pattern publisher.
Last updated: March 12, 2026