Privacy Policy of Levelgrid
Last Updated Date of This Privacy Policy: July 24, 2026
Welcome to Levelgrid (hereinafter referred to as "this App"). Levelgrid is an offline-oriented sudoku and logic puzzle application independently developed and operated by us (hereinafter referred to as "we"). We highly value the protection of your personal privacy information and strictly abide by global data protection legislation, Apple App Store Review Guidelines, Apple privacy specifications and relevant regulatory requirements. We strive to deliver safe, private and comfortable number puzzle experiences for all users.
This Privacy Policy clearly explains how we collect, utilize, store and safeguard your personal information, together with all legal rights you hold related to your data. Please carefully read and understand all provisions of this Policy before you start using Levelgrid, especially the core privacy protection rules. Your ongoing use of the App means you fully understand and voluntarily agree to all terms contained within this Policy. If you object to any clause in this Policy, you must stop using this App immediately.
I. Categories of Information We May Collect
We only collect information that is necessary to operate core App functions and optimize user experience, strictly following the principles of legality, proportionality and data minimization. We never gather personal data irrelevant to our service scope. Specific categories are set out below:
(I) Information You Voluntarily Generate and Save
Puzzle Preference Settings: When adjusting game options inside the App, you may configure interface styles, control modes, auxiliary tool switches and difficulty preferences. These personalized configurations are only used to retain your custom operating habits and improve interactive experience.
Saved Puzzle Content: Any unfinished sudoku drafts, puzzle-solving progress, local solving records and achievement data you generate are saved locally on your mobile device. We will not upload these private puzzle archives to remote servers unless you provide clear, separate authorization.
Game Progress Data: Information generated in the process of completing puzzles, including challenge records, daily challenge streaks and unlocked achievement status. Such content is only stored locally for you to view your own puzzle journey.
(II) Special Protection Statement for Local Private Game Data
Levelgrid focuses on offline sudoku gameplay and casual logic training. Your puzzle drafts, solving records and personalized settings belong to your private usage data. All relevant content adopts full local processing without automatic server upload, and we enforce strict privacy protection standards in accordance with global data protection regulations:
Collection Boundary: We only obtain puzzle configurations, game progress and preference data that you actively create, modify or save when operating App functions. No passive background collection of personal information will happen without your active manual operation.
Scope of Authorized Usage: All locally generated puzzle data is solely processed to render sudoku grids, maintain game progress and retain your custom settings. This data will never be adopted for user profiling, identity tracking, targeted advertising or any purposes unrelated to puzzle services.
Local Storage Rule: Our cloud servers do not store copies of your puzzle drafts, solving records and personal preference configurations. Temporary cache generated during puzzle calculation will be automatically cleared after you close the puzzle page or exit the App; only manually preserved game archives remain stored locally on your device.
Strict Non-Disclosure Commitment: We will never disclose, distribute or transfer your private puzzle archives and personalized settings to any third-party enterprises, organizations or individuals. All sudoku generation and grid calculation operations run fully offline on your equipment, with no third-party parties participating in the processing of your private game data.
(III) Automatically Collected Anonymous Technical Information
Device Technical Information: To maintain stable App operation, resolve compatibility faults and optimize running performance, we may anonymously collect your device model, iOS system version, App installation version and anonymous device identifiers such as IDFA / IDFV (collection will only take place after you grant corresponding system permissions). Such desensitized device data is merely used for technical debugging and cannot be associated with your unique personal identity.
Anonymous Usage Statistics: We aggregate de-identified behavioral data such as function opening frequency, puzzle completion volume and average playing duration. All statistical information is fully anonymized and cannot be linked to individual users, and is only used to analyze general user habits for function iteration and product upgrade.
Application Crash Logs: When the App crashes or encounters functional abnormalities, we may generate brief running logs containing operation timestamps, interactive steps and error triggers. Logs are exclusively used to troubleshoot technical defects and strengthen App stability, and will not be reused for other unauthorized commercial purposes.
II. Legitimate Purposes for Using Your Personal Data
We limit all data processing activities to the following clearly stated purposes under the minimum necessity standard:
Provide, maintain, update and optimize all core App functions, including multi-specification sudoku puzzles (Classic 9×9, 6×6 Beginner, Diagonal variant), multi-grade difficulty modes, daily challenges, solving auxiliary tools, achievement system and local game archive management;
Optimize App operating efficiency, cross-device compatibility and overall user experience, diagnose and fix program bugs and technical failures;
Send necessary service notifications including version upgrade reminders and function iteration announcements;
Fulfill statutory legal obligations, respond to formal official legal requests and safeguard our legitimate intellectual property rights and operating interests;
Other data usage scenarios that you separately and explicitly authorize.
We will never utilize your personal information for unstated commercial or non-service purposes without your prior clear consent.
III. Offline Local Processing & Storage Mechanism of Your Private Content
Levelgrid adopts a local-first offline processing framework. All core sudoku generation, puzzle rendering, progress recording and preference saving operations run independently on your local iOS device:
Local Offline Calculation: Every sudoku grid generation, auxiliary number calculation and game progress processing task runs entirely on your mobile hardware. Without your written explicit authorization, we will never transmit your puzzle drafts, solving records and personalized settings to remote cloud servers.
Exclusive Local Storage: All manually saved unfinished puzzles, achievement records, daily challenge data and preference configurations are stored only within your device’s local storage. Our cloud servers hold no copies of your private game data.
Automatic Temporary Cache Cleanup: Short-lived temporary cache generated during puzzle solving is stored locally and will be automatically erased once the task ends or you close the App. We do not retain temporary cached data for a long period.
IV. Sharing, Disclosure and Transfer Regulations for Personal Data
No Unauthorized Third-Party Sharing: Without your clear written consent, we will never share your puzzle data, personalized settings and other private personal information with external third parties.
Prohibition on Commercial Data Transactions: We will never sell, rent, trade or conduct other commercial transfers of your personal information to any third-party entities for profit.
Statutory Mandatory Disclosure: We may disclose your personal data only when required by law, or in response to formal legal requests issued by courts, government regulatory authorities and other competent official institutions.
Business Merger & Asset Transfer Clause: In the event of corporate merger, acquisition or full/partial asset transfer, your personal information may be transferred as part of business assets. We will issue prominent in-app advance notifications before such transfer, and oblige the receiving entity to fully comply with all clauses of this Privacy Policy to protect your data security.
V. Your Legal Rights Over Personal Information
You enjoy the following complete rights with respect to all personal data stored within Levelgrid:
Right to Access Data: You may view all locally saved puzzle archives, solving records and preference configurations via the privacy page located inside App Settings.
Right to Erase Data: You are able to independently delete any saved puzzle drafts, game records and custom settings within the App at any time. If you intend to clear all personal data related to your usage, you may submit an application to customer service. We will complete full data deletion after identity verification (excluding data required to be retained by mandatory laws). Temporary calculation cache clears automatically after use and requires no manual removal.
Right to Revoke Permissions: You may withdraw all system permission authorizations granted to Levelgrid via the Privacy & Security panel within your Apple device system settings; you can also withdraw consent for our collection and use of personal data through internal App privacy settings. After consent revocation, we will stop collecting corresponding categories of your data. Data processing activities completed under your previous valid consent before revocation remain legally effective.
Account Cancellation Right: You may contact customer service to submit an account cancellation request. After account cancellation is fully processed, we will delete all your bound personal data in accordance with legal requirements, and you will lose complete access to all App functions.
If you encounter operational obstacles when exercising any of the above data rights, you may reach us via the contact channel listed at the end of this Policy. We will reply to your requests and provide relevant support within 15 working days upon receipt.
VI. Protection Policy for Minors’ Personal Information
This App is oriented to users aged 18 and above. We will not actively collect personal information of minors under 18 years old. If you are a minor, you may only use Levelgrid under continuous supervision and explicit consent of your legal guardian; you are prohibited from submitting private custom data without guardian approval.
If a legal guardian finds that a minor has generated and saved private game data in our App without prior consent, please promptly contact our customer service team. After identity authentication, we will fully erase all relevant minor personal data and implement corresponding functional access restrictions.
VII. Updates to This Privacy Policy
We reserve the right to revise and update this Privacy Policy to adapt to newly issued data protection laws, continuous iteration of App puzzle features and changing user service demands. All revised versions of this Policy will be prominently notified to users via in-app pop-up windows and system announcements, and the updated Policy formally takes effect on its release date.
Your continued use of Levelgrid after a Policy update constitutes your full acceptance of all revised terms. If you disagree with the updated clauses, you must discontinue all App usage and may submit an account cancellation application as needed.
VIII. Contact Information
If you have inquiries, feedback or complaints regarding this Privacy Policy, need to exercise your personal data rights, or want to report suspected privacy data leakage incidents, please communicate with us through the official support email below:
Customer Service Email: Harperlei220@outlook.com