1. Who we are
Sudokuly is operated by CHRISTOS MOUNTZOURIS, based in Greece, who is responsible for your personal information (the data controller). For privacy questions or requests, contact support@mountzou.dev.
2. What we collect
Account details. When you sign in with Apple or Google, we receive account identifiers, your sign-in provider, and your name, email and basic profile details when available. Apple’s Hide My Email shares a relay address. We never receive your Apple or Google password.
Game history. We save a summary of each finished game: identifiers, date and time, difficulty, result, playing time and mistakes, linked to your account. This covers wins, three mistakes or timeouts. History excludes grids, solutions, moves, notes and unfinished games.
Technical details. Our sign-in and cloud providers process IP addresses, account or device identifiers, device, system and app details, and diagnostic and service-usage data. Google may infer a general location from your IP address to prevent fraud. The app does not request GPS, contacts, camera or photo-library access.
3. How we use your information
We use account details and game results to provide sign-in, saved history, progress summaries and account deletion. Sign-in is required to use Sudokuly. Under the GDPR, this is necessary to provide the service you request (performance of a contract).
We use technical data to keep the app reliable and secure, prevent abuse and fix problems, and support messages to answer you. This serves our legitimate interests, balanced against your rights. We also process information when legally required.
Sudokuly has no ads, does not sell personal data or track you across apps, and has no Google Analytics or Firebase Crashlytics integration. Providers may still process technical diagnostics. We make no automated decisions with legal or similarly significant effects.
4. Providers and sharing
Google’s Firebase provides account management and cloud game-history storage. Apple or Google handles your chosen sign-in under its own privacy policy. Our support mailbox uses Apple iCloud.
Your history is private, not a public profile or leaderboard. We and authorized providers access information only as needed to run the service, assist you, meet legal duties or handle legal claims.
For details: Firebase Privacy and Security, Google Privacy Policy and Apple Privacy Policy.
5. Where your data is processed
Game history is stored in Frankfurt, Germany. Firebase processes sign-in data in the United States. Apple, Google and their providers may also process data in other countries.
Google’s terms describe transfer safeguards, including the EU–US Data Privacy Framework and Standard Contractual Clauses where applicable. See the Firebase data-processing terms, Cloud data-processing terms and Apple Privacy Policy. Contact us for details or a copy of the applicable safeguards.
6. How long we keep your data
We keep account details and game history until you delete your account or request deletion; history does not expire automatically. Signing out or uninstalling the app does not delete them.
Your device stores sign-in details, cached history and results waiting to upload. Pending results survive restarts and sign-out, upload when you reconnect with the same account, and are removed after saving. Unfinished puzzles cannot be restored after restarting the app.
Firebase keeps sign-in IP logs for a few weeks and removes other sign-in data from live and backup systems within 180 days after deletion starts. Other provider logs and backups follow their retention rules. Device caches may remain until refreshed or app data is removed.
Support messages are kept only as long as needed to handle your request or meet legal requirements. You may request their deletion.
7. Deleting your account
Open Account → Delete account, confirm and sign in again with the same provider. Internet access is required. Successful deletion removes your Sudokuly account, cloud game history and this device’s pending results, and disconnects the app from your sign-in provider. Your Apple or Google account remains. Contact us if you need help; we may verify account ownership.
8. Security
We use encrypted connections and storage, restricted access to private history, and protected device storage. No system can guarantee complete security.
9. Your rights
Under applicable law, you may access, correct, delete or obtain a portable copy of your data, restrict its use, or object to processing based on legitimate interests. Where consent applies, you may withdraw it without affecting earlier lawful processing. You may complain to your data-protection authority. Email support@mountzou.dev to exercise these rights. GDPR requests are normally answered within one month; we will explain any permitted extension within that time. We may verify your identity.
10. Children’s privacy
Sudokuly is for a general audience and is not designed specifically for children. Contact us if you believe a child has provided personal information inappropriately so we can investigate and act.
11. Changes to this policy
We update this policy when needed and show the latest date above. We will give additional notice of material changes where required.