Play without an account
Sudoku Legend works offline and does not require a MoMuTu account or in-app purchases. All 500 puzzles are available without payment. On iOS, each new puzzle session includes one free logical hint; further hints require an optional rewarded ad. The iOS version includes Google AdMob advertising but no separate online gameplay analytics service. Android advertising is deferred: the current Android build has no ad SDK and its hints remain free. Unity cloud analytics and cloud crash reporting are disabled.
Advertising
Google AdMob may process an IP address and approximate location inferred from it, device or app identifiers available under your device settings, ad views and interactions, and crash, performance or other diagnostic data to deliver, measure, protect and improve advertising services. This data is handled by Google under its Privacy Policy and advertising information. On iOS, one banner appears at the bottom of the pause menu opened during a puzzle, away from navigation controls. It is hidden on other pages and during play. After the first free hint in a puzzle, players may choose “Watch ad · 1 hint”. A hint is granted only when Google confirms the reward; cancelling or an unavailable ad does not grant a hint or block ordinary play.
Where required, a consent flow will be shown before ads are requested and an in-game privacy option will let you revisit available choices. Watching a rewarded ad is optional and declining it does not block offline gameplay. This version requests non-personalized ads, disables Google’s publisher first-party ID and does not request AppTrackingTransparency permission or access to IDFA. Non-personalized ads may still process data for delivery, measurement and fraud prevention. Available ad privacy choices can be reopened from Settings.
Progress on your device
The game stores your current puzzle, entries, pencil notes, undo history, active playing time, hint and entry counters, unused earned hints and reward request identifiers, completed-game statistics and settings on your device. A confirmed ad reward is also recorded locally until its hint entitlement has been saved, so a restart can recover it. Reading a hint consumes the entitlement; applying that same hint does not consume another. Local recovery copies help recover from some file problems; they are not a backup on another device. Clearing app storage or uninstalling removes local data, subject to backups managed by your operating system.
Optional Apple backup
On iOS versions that offer Apple backup, you may enable it in Help & Options → Privacy. The game uses Apple GameKit saved games to store progress and settings in your own iCloud account. This requires iCloud Drive, an available Game Center sign-in, internet access and iCloud storage. Gameplay remains available when backup is off or unavailable.
After you enable it, the game periodically checks and saves while the app is running. It only reports a successful backup after Apple confirms the save. On another Apple device, connect the same Apple accounts and choose a saved puzzle to restore. Different in-progress puzzles are retained for your choice; completed-game statistics are combined without counting a session twice.
Backup content includes the game data listed above and saved alternative puzzles. An opaque account marker is kept locally to detect account changes. A per-installation/device marker distinguishes backup files so one device does not replace another device’s file. Apple processes these records under its own terms and privacy policy. MoMuTu does not operate a server that receives these backups or your Apple password.
You can pause automatic backup in the game. Pausing does not delete existing cloud copies. Removing the app does not itself delete iCloud copies. Manage stored app data through Apple’s iCloud storage controls where available, or contact us for help locating the appropriate controls. Automatic copying is paused when an account change is detected; copying existing local progress to another account requires your explicit choice.
Android Google Play Games backup and migration between iOS and Android are not connected in this version. Do not rely on local recovery copies to restore a lost or replaced device.
Website, support and platform services
MoMuTu does not receive your Sudoku progress unless you choose to send it in a support message. If you contact us, we receive your email address, message and any attachments you choose to include. Ordinary website logs may contain request details such as IP address, browser, page and time for delivery and security. This website has no advertising cookies or third-party analytics.
App-store downloads, operating-system backups and diagnostics controlled by your device platform are managed under Apple or Google settings and policies. We do not sell personal information.
Retention and your choices
Game data remains locally until removed by you or the operating system. Apple backups remain subject to your iCloud controls. Support correspondence is retained only as needed to answer requests, resolve issues or meet applicable obligations. Do not include sensitive information in a support request unless necessary. No storage system can guarantee recovery, so confirm the last successful backup before changing devices.
Changes to this notice
If advertising, purchases, online analytics or backup services differ in the released version, we will update this notice and the app-store disclosures to match. The general studio policy also covers this website and communications, where consistent with this Sudoku-specific notice.
Contact
For support or privacy questions, email chientt510@gmail.com and include “Sudoku Legend” and your device platform.