Stillgrid Privacy Policy
Stillgrid is an offline Sudoku game. You don't need an account, and the app has no server of its own. This page explains what data the app keeps on your device and what the third-party services it uses (Google AdMob for ads, Google Analytics for Firebase for usage statistics, Google's consent tool, and Google Play for the Premium purchase) collect.
Data the app keeps on your device
- The game in progress (board, notes, timer, undo history) so you can continue exactly where you stopped.
- Finished games: difficulty, time, mistakes, hints used, date. These power your statistics.
- Your settings (theme, highlights, mistake checking and similar).
- Whether you own Premium (a cached copy of what Google Play reports), your last consent answer and your Usage statistics choice.
This data stays on your device. The app does not send it to us or to anyone else. If Android's backup is turned on for your Google account, Android may include the app's settings and statistics in your device backup, which Google stores under your account.
Ads (Google AdMob)
The free version shows ads: a banner on the home screen, an ad box on the statistics screen, an occasional full-screen ad after you finish or abandon a puzzle, and an optional video ad you can choose to watch for an extra hint. Ads never appear on the game board screen.
Ads are provided by Google AdMob. To show and measure ads, the Google Mobile Ads SDK collects and shares with Google:
- your device's advertising ID (and app set ID),
- device and app information (device model, OS version, app version, language, screen size),
- approximate location derived from your IP address,
- ad interaction data (which ads were shown and tapped) and crash/diagnostic data from the SDK.
Depending on your consent choices, ads may be personalized. Learn more in How Google uses information from sites or apps that use its services and the Google Privacy Policy.
Usage statistics (Google Analytics for Firebase)
To learn how the app is used (for example how many puzzles are started and finished, which difficulty, how often hints or the Premium screen are used, and ad revenue per session), the app uses Google Analytics for Firebase. It collects app interactions with predefined, coarse values only (difficulty, result, durations in seconds, counts) plus device information, an app instance identifier and, where allowed, the advertising ID. It never records anything you enter on the board or elsewhere in the app.
Analytics follows the same consent as ads: nothing is collected until your consent choice is known, and in regions that require consent it is collected only if you agree to storing and accessing information on your device. You can turn it off at any time in Settings > Privacy > Usage statistics. See Privacy and Security in Firebase.
Consent and your choices
- In the European Economic Area, the UK and Switzerland, the app asks for your consent with Google's User Messaging Platform before any ad is requested. You can change your choice at any time in Settings > Privacy choices (shown when your region requires it).
- You can reset or delete your advertising ID in your device's Android settings (Settings > Privacy > Ads), or opt out of ad personalization there.
- Premium removes all ads. Premium users' devices never start the ads SDK.
Purchases (Google Play)
Premium is a one-time purchase handled entirely by Google Play. The app never sees your payment details; it only receives a confirmation from Google Play that you own Premium. See the Google Privacy Policy and Google Payments Privacy Notice.
Permissions
| Permission | Why |
|---|---|
| Internet, network state | Loading ads and talking to Google Play for the Premium purchase. The game itself works offline. |
Advertising ID (AD_ID, Ad Services) | Declared by the Google Mobile Ads SDK to show and measure ads. |
| Google Play billing | The one-time Premium purchase. |
| Wake lock, foreground service | Declared by Google libraries the ads SDK uses for background work; the app itself runs nothing in the background. |
The app does not request location, contacts, camera, microphone, storage or notification permissions.
Children
Stillgrid is not directed at children under 13 (or the minimum age in your country), and we do not knowingly collect their data.
Keeping and deleting data
Data on your device stays until you delete it. Uninstalling the app, or clearing its storage in Android settings, removes everything the app stored. Data collected by Google for ads and purchases is kept under Google's own policies; you can manage it at myaccount.google.com.
Changes
If this policy changes, we'll update this page and its effective date, and mention notable changes in the app's release notes.
Contact
Questions: sebiradutoiu@gmail.com