Privacy Policy

This Privacy Policy explains how personal data is collected and used when you use the WeaveMetric Studio app, the website kelwerk.com and related services (together, the Service).

1. Who we are

The Service is operated by Hemant Kumar Singh, a sole proprietor trading as "Kelwerk" ("Kelwerk", "we", "us"), New Delhi, India. Address for notices: New Delhi, India. Email: support@kelwerk.com. Phone: +91 87002 38266.

For the purposes of India's Digital Personal Data Protection Act, 2023 (the DPDP Act), we are the data fiduciary for the personal data described here. If the Service is transferred to a company we set up, we will update this policy and tell you.

2. The short version

• Fabric photos are sent to our servers only so we can measure them. A photo and its working data are deleted automatically within 5 minutes. We do not look at, keep or use them for anything else.
• Your analysed images, measurement results and saved projects are kept only on your phone. Our servers hold a photo and its working data for at most 5 minutes, then delete them. If you choose to send us a photo or result for support, we use it only to answer you.
• We collect account and usage data only to run your account, prevent abuse and keep the Service working.
• We do not sell your personal data and do not show advertising.

3. What we collect

Account details. Your name, email address and, if you choose to add it, phone number. If you sign in with Google, we receive your name and email address from Google. Passwords are handled by Google Firebase Authentication and stored only in hashed form; we never see your password.

Account number (paid plans). When you subscribe through Google Play or redeem a company plan's purchase code, your account gets a pseudonymous account number, such as KW-7ZQ4M2X9KD. It is random, not derived from your name, email or phone number. It is shown in the app, identifies your saved project files to our support, and is deleted with your account.

Device and security information. Phone model, Android version, app version, a pseudonymous device identifier derived from your phone's Android ID (we store a one-way hash, not the ID itself), and security signals from Google Play Integrity and Firebase App Check that confirm the app is genuine. We use these to keep accounts secure, enforce device limits and allow one free trial per device.

Fabric photos. When you count threads or measure GSM, the photo is uploaded to our servers for processing. The server keeps working data next to it (the corrections and thread positions its count found, no images), so that further steps on the same photo do not count it again. The photo and its working data are kept at most 5 minutes after the photo arrives, then deleted automatically; they are deleted sooner when you start the next capture, when the app goes to the background or closes, or when you save. If an automatic deletion ever fails, a backup clean-up removes them within one day. Photos are never used to train or improve our methods, shared, or viewed by people, unless you choose to send us a photo or result for support; we then use it only to answer you.

Results and calibration. Measurement results (thread counts, yarn counts, GSM), marked-up images and calibration files you create are stored on your phone until you delete them or uninstall the app. We do not receive them, unless you choose to send us a photo or result for support; we then use it only to answer you. Calibration files for popular phones that you download from us are also stored on your phone.

Saved projects (paid plans). A project you save is a file stored on your phone. It contains your account number, the analysis data (results, settings and corrections) and the images: the photo as it was measured, the corrected picture and the marked-up picture. It can be read only by WeaveMetric Studio on paid accounts; anyone you share a project file with can open it in the app. We do not receive your project files.

Usage information. Which features and counting methods you use, how many photos you analyse, processing times, errors and app version, linked to your account through a pseudonymous ID. This does not include your images or your measurement values.

Purchases. Subscriptions bought through Google Play are paid to Google; we receive only the subscription status and a purchase reference, never your card or bank details. For company plans (purchase codes), we keep the details needed for the quotation and invoice, such as company name, contact person, billing details and GST number.

Messages and enquiries. When you email us, call us, or use the contact or demo forms on our website, we receive what you send, such as your name, company, role, city, email, phone number, preferred demo date and message.

Notifications. If you allow notifications, your phone receives a notification token from Firebase Cloud Messaging so we can send you service messages. You can switch notifications off in your phone's settings.

Website. kelwerk.com does not use advertising or tracking cookies. Our contact and demo forms use Cloudflare Turnstile to check that a person, not a program, is sending them; Turnstile processes your IP address and browser information for that check.

4. Why we use it

1. To create and run your account and provide the Service.
2. To manage trials, subscriptions, promotional codes, company plans, device limits and usage limits.
3. To prevent fraud and abuse, such as repeated free trials or account sharing.
4. To reply to your messages, arrange demos and provide support.
5. To send service messages, such as trial reminders and important changes.
6. To keep the Service reliable and secure, using aggregated usage and error information.
7. To meet our legal, tax and accounting obligations.

We process your data with your consent, which you give when you create an account, send us an enquiry or allow notifications, or where the DPDP Act otherwise permits. You can withdraw consent at any time (section 8); some parts of the Service may then stop working, and withdrawal does not affect processing done before it.

5. Who processes it for us

• Google Cloud and Firebase: servers, sign-in, database, storage, security checks and notifications. Our servers and database are in India (Mumbai). Some Google services, such as sign-in and notifications, may process data outside India.
• Google Play: app distribution, subscriptions and payments.
• Zoho Mail: our email.
• Cloudflare: domain name services for kelwerk.com, and the spam check (Turnstile) on the website's forms.

These providers act on our instructions and only for the purposes above. We share personal data with authorities only when the law requires it, and with a buyer or successor if the Service is transferred, under this policy.

6. How long we keep it

7. How we protect it

All data is sent over encrypted connections (HTTPS) and stored encrypted by our cloud provider. Access to our systems is limited to what each part of the Service needs, and our servers accept requests only from the genuine app with a signed-in account, or from the forms on kelwerk.com after a spam check. No system is perfectly secure; if a personal-data breach affects you, we will inform you and the authorities as the law requires.

8. Your rights

Under the DPDP Act you can:

• ask for a summary of the personal data we hold about you and how we use it;
• ask us to correct, complete or update it;
• ask us to erase it (section 9);
• withdraw your consent;
• nominate another person to exercise your rights if you die or become unable to;
• raise a grievance with us and, if you are not satisfied with our response, complain to the Data Protection Board of India.

To use these rights, email support@kelwerk.com from your account's email address. We will reply within 30 days.

9. Deleting your account

You can delete your account in the app (Settings › Account › Delete account) or by following the steps on our Delete your account page. If you have a Google Play subscription, cancel it in Google Play first, because deleting your account does not stop Google Play's billing. If you have an active company plan, contact us. We delete your account data within 30 days, except the items in section 6 that we must or may keep.

10. Children

The Service is meant for businesses and adults. We do not knowingly collect personal data from anyone under 18. If you believe a child has given us personal data, contact us and we will delete it.

11. Changes to this policy

We may update this policy. If the changes are significant, we will tell you in the app or by email before they take effect. The date at the top shows the latest version.

12. Grievance Officer and contact

Grievance Officer: Hemant Kumar Singh. Email: support@kelwerk.com. Phone: +91 87002 38266 (Monday to Saturday). Address: New Delhi, India. We acknowledge grievances within 48 hours and resolve them within one month.