Privacy Policy and Account Deletion

The YDS Matik app and ydsmatik.com are provided by LUSGA LTD, a company registered in England and Wales (Company Number 17396894; 124-128 City Road, London, England, EC1V 2NX). For any request about this policy: info@ydsmatik.com.

YDS Matik collects only the minimum data needed for it to work. The table below summarises which data is collected and why:

Guest users: You can use the app without creating an account. In that case all data stays only on your device and no personal information is sent to a server.

The data we collect is used only for the following purposes:

• Progress sync (multi-device support): when you sign in, your learning progress stays up to date on all your devices.
• Error monitoring (app quality): technical errors are detected and fixed in future updates. No personal content is collected.
• Feedback (product improvement): feedback you send is used only to improve content and features.
• Authentication (account security): email and Google OAuth are used only to verify your identity.

What we never do: your learning data (words, test results, email) is not used for advertising, and it is not sold or shared with third parties. Only the advertising ID collected by Google AdMob itself is used to show ads (see "Ads" below); your study data is not passed to AdMob.

YDS Matik uses a hybrid free model: part of the content is open to everyone, and locked sections can be opened for 24 hours by watching a rewarded ad (at most 5 ads per day). Ads are shown only when you start the "Watch ad" action yourself; there are no banner or automatic interstitial ads in the app. Ads are served by Google AdMob, and AdMob processes your Android advertising ID and device information for ad selection and fraud prevention.

Users in the European Economic Area and the United Kingdom see Google's user consent (UMP) form on first launch; you can change your personalised ads consent at any time in the app under Settings → Data → Ad preferences. To turn off personalised ads at device level on Android, use Settings → Google → Ads → Opt out of ads personalisation. In the Premium version no ads are shown and the ad SDK is not started.

Play Console "Data safety" declaration: Device or other IDs — collected for advertising, shared with Google AdMob, not optional for the user (processed when you choose to watch an ad in the free version).

Your learning progress is kept first in your device's local storage (localStorage). When you create an account, the same data is also backed up in Google Firestore.

Firestore security rules ensure that each user can access only their own document. Another user cannot read or change your data.

Firebase infrastructure uses TLS encryption for all data in transit and AES-256 encryption at rest.

YDS Matik uses only the following trusted third-party services. Each of them is subject to its own privacy policy:

YDS Matik is generally intended for adult users preparing for university-level exams. The app does not knowingly collect personal data from children under 13. If we become aware of such a case, the data is deleted as soon as possible.

You have the following rights over your personal data:

• Right of access: you can find out which data is held about you.
• Right to rectification: you can ask for incorrect or incomplete data to be corrected.
• Right to erasure: you can permanently delete your account and all your data.
• Portability: you can export your data as JSON (Settings → Export backup).

To use any of these rights, email info@ydsmatik.com. For account deletion, see the section below.

The contact form on ydsmatik.com does not store or send any data from the website; it only opens the email app on your device with a ready message. Your name, email address and message in emails you send to info@ydsmatik.com are used only to reply to you. They are not used for advertising or marketing and are not sold. You can ask for them to be deleted at the same address.

The website does not use analytics tools, ad pixels or tracking cookies. Fonts are served from the site's own server.

Significant changes to this policy will be announced through an in-app notice or by changing the update date on this page. If you continue to use the app after changes are published, you accept the updated policy.

For questions, comments or requests about our privacy policy, write to info@ydsmatik.com. Response time: 3–5 business days.

In line with Google Play policy, every user who created an account in the app can delete their account and related data at any time.

• In the app (instant): Settings (Ayarlar) → Delete my account and data (Hesabımı ve Verilerimi Sil) → Confirm. All data is deleted immediately and irreversibly.
• By email (3–5 business days): if you cannot access the app, you can send a request by email. Your data is deleted after identity verification.

Steps for deletion by email:

1. Send an email to info@ydsmatik.com with the subject "Account deletion request".
2. Include the email address or Google account address registered to your account.
3. We may send you a verification email. This step may be needed for your security.
4. Your request is processed within 5 business days and all your data is permanently deleted.

Please note: account and data deletion cannot be undone. Your learning progress, word list, statistics and all personal data are permanently deleted. Before deleting, you can save your data as JSON via Settings → Export backup.