Effective date: August 28, 2026
Beijing Shadow Stitch Technology Co., Ltd. (“we,” “us,” or “our”) respects your privacy. This Privacy Policy explains how we collect, use, store, share, and protect personal information when you use Coutto Sew, Knitto Stitch, our website at shadowstitch.ai, and related online services (collectively, the “Services”).
Please read this policy carefully before using the Services. By accessing or continuing to use the Services, you acknowledge this Privacy Policy.
1. Scope
This policy applies to our tool and mobile app Services, including:
- Coutto: pattern projection, cutting, printing, management, and storage
- Knitto Stitch: photo-guided stitch cookbook, symbol search, favorites, and row counters
- Shadow Stitch website: product information and contact pages
If a specific Service provides a separate privacy notice, that notice applies where it conflicts with this policy.
2. Information We Collect
We collect information that is reasonably necessary to provide and improve our Services.
2.1 Information you provide
- Contact information: email address, name, and message content when you contact us
- User content: patterns, images, project files, and knitting records you import, create, or manage (primarily processed and stored on your device)
2.2 Information collected automatically
| Type | Examples | Purpose |
|---|---|---|
| Device information | device model, OS version, language, display settings | compatibility and support |
| App information | app version, install source, feature usage | product improvement |
| Log data | crash reports, error logs, performance metrics | stability and security |
| Network information | IP address (may be truncated or generalized) | security and analytics |
2.3 Permissions
To enable certain features, our apps may request permissions such as:
- Photos / files: import, export, or save pattern and project files
- Camera (if applicable): capture or scan pattern-related content
- Network: updates, sync, or loading required resources
You can revoke permissions in device settings. Some features may not work without the relevant permission.
2.4 AI and smart features
If you use AI-assisted features, we may process content you submit (such as pattern images or project descriptions) only as needed to provide those features. We do not use such content beyond what is necessary for the requested functionality.
2.5 Coutto Sew (iOS)
When you use the Coutto Sew iOS app, we may collect the information below to provide the Service. It may be linked to your account or device. We do not use it to track you across other companies’ apps or to show you third-party ads. The full policy (including Android, third-party services, and account deletion) is the Coutto Privacy Policy.
| Type | Collected | Details |
|---|---|---|
| Email Address | Yes | If you sign in with Apple and choose to share your email; if you claim a beta membership; if you contact us |
| Name | Yes | Display name and bio on your profile; the name you choose to share when you sign in with Apple |
| Phone Number | No | The iOS app does not offer phone-number sign-in |
| User Content | Yes | Pattern and embroidery files, tags, and folders; cloud backup if you enable it |
| Photos or Videos | Yes | Profile photos you upload; images used to scan or calibrate (processed mainly on your device) |
| User ID | Yes | Identifiers used for sign-in and cloud backup, including the account identifier Apple provides |
| Device ID | Yes | Used to distinguish devices, understand usage, and help prevent abuse; not used for ads or cross-app tracking |
| Purchase History | Yes | Your App Store subscription and credit purchases; we do not collect card numbers |
| Product Interaction (Usage Data) | Yes | How long you use the app and which features you use |
| Crash Data, Performance Data | Yes | Diagnostic information when the app fails or runs poorly |
| Advertising Data | No | We do not use your information for advertising or to track you across apps |
3. How We Use Information
We may use information to:
- Provide, maintain, and improve Coutto, Knitto, and related Services
- Respond to inquiries, feedback, and support requests
- Protect the security and integrity of the Services
- Perform aggregated or anonymized analytics to improve user experience
- Comply with applicable laws and regulatory requirements
4. How We Share Information
We do not sell your personal information. We may share information when:
- You give consent
- Required by law or valid legal process
- Service providers help us operate the Services (e.g., hosting, analytics, crash reporting, email delivery), subject to confidentiality obligations
- Business transfers occur (merger, acquisition, or reorganization), with continued protection under this policy
5. Storage and Retention
- User content is primarily stored on your device unless you enable cloud sync or backup features
- We retain information only as long as necessary for the purposes described in this policy
- Information is generally stored in the People’s Republic of China. Cross-border transfers, if any, will follow applicable legal requirements
6. Security
We use reasonable technical and organizational measures to protect your information, such as access controls and encryption where appropriate. No method of transmission or storage is completely secure.
7. Your Rights
Depending on applicable law, you may have the right to:
- Access and obtain a copy of your personal information
- Correct or update inaccurate information
- Delete information where legally permitted
- Withdraw consent (without affecting prior processing based on consent)
- Close your account (if applicable)
- Request an explanation of our processing practices
Contact us at admin@shadowstitch.cn to exercise these rights. We will respond within a reasonable period after verifying your identity.
8. Children’s Privacy
Our Services are intended primarily for adults. If you are under 18, please use the Services with guardian guidance. We do not knowingly collect unnecessary personal information from children.
9. Changes to This Policy
We may update this Privacy Policy from time to time. Material changes will be communicated through the app, website, or other reasonable means. Continued use after updates constitutes acceptance of the revised policy.
10. Contact Us
Beijing Shadow Stitch Technology Co., Ltd.
- Email: admin@shadowstitch.cn
- Website: https://shadowstitchai.github.io
If you have questions, comments, or complaints about this Privacy Policy, please contact us at the email above.
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