Effective date: October 3, 2026 · App: Sudoku (com.whizkidworld.sudoku)
Sudoku is published by Whizkid World LLP ("we", "us"), which is responsible for the information described here.
This policy describes what information the Sudoku app handles and how. The short version: your puzzles, scores, and settings stay on your device. Six things do leave it — what Google AdMob collects to serve ads, crash and stability reports sent to Google Firebase Crashlytics, a daily request for that day's shared puzzle, anonymous usage statistics, a periodic check for settings we can adjust without an update, and — only if you choose to leave one — a rating through Google Play's own in-app review card. Each is described below.
The app stores the following locally, on your device, and does not upload it or link it to you:
You can erase all of this at any time from inside the app (see Deleting your data below), by clearing the app's data in Android settings, or by uninstalling the app. The app has no user accounts in this version, and none of the above is uploaded or linked to you.
The app reports anonymous statistics about how it is used, so we can tell whether the game is too hard, whether hints run out too quickly, and whether ads appear too often. A report contains:
We do not send your name, avatar, puzzle contents or scores, and none of it is used for advertising. Times are reported as ranges specifically so that a completion time cannot be matched back to an individual player.
Usage statistics are collected only in the version you install from Google Play. Development and test builds of the app report nothing.
Google processes these on our behalf under the same policies linked below.
The app periodically asks our provider (Google Firebase) for a small set of values — how often ads may appear, how many free hints a game starts with. The request carries the same installation identifier and nothing about you. If it fails, the app uses the values it shipped with.
The app shows ads served by Google AdMob. Google collects and shares the following for advertising, analytics and fraud prevention:
This collection is performed by Google under its own policies:
In regions that require it (e.g. the EEA/UK), the app asks for your consent before showing personalized ads, and you can choose non-personalized ads. You can change that choice at any time in the app: Me → Privacy → Personalised ads. You can also reset or delete your Advertising ID in Android settings (Settings → Privacy → Ads).
Each day's puzzle is the same for everyone, so the app fetches it from our server (hosted on Supabase). The request is anonymous and one-way: it asks for that date's puzzle and sends nothing about you, your progress or your device beyond what any internet request necessarily carries — principally your IP address. Our hosting provider records that address in its request logs, along with the approximate location it implies (country, region and city), and deletes those logs after no more than seven days. Nothing in them is linked to a person, and this version of the app has no accounts to link them to.
If the app has no connection it generates the same puzzle on your device instead, so the daily challenge works offline.
When the app crashes, a report is sent to Google Firebase Crashlytics so we can find and fix the fault. A report contains:
Firebase also reports basic app session events (that the app was opened and for roughly how long), which is how crash reports are attributed to a run.
We do not attach your name, email, profile or game data to these reports, and they are not used for advertising. Google processes them on our behalf under its own policies:
Crash reporting is off in development builds of the app and on in the version you install from Google Play.
After a good game the app may ask the Google Play Store to show its in-app review card. The card is Play's, not ours: we send nothing, we are not told whether it appeared, and we are never told whether you left a review or what it said. Any rating you choose to leave goes to Google under your Play account, exactly as it would if you rated the app from the Play Store directly.
You can stop the app asking at all: Me → About Game → I've already reviewed.
The optional daily-challenge reminder is scheduled entirely on your device. It involves no server and can be turned off in the app (Me → Settings → Notifications → Daily challenge reminder) or via Android's notification settings.
The app is a general-audience puzzle game. We do not knowingly collect personal information from children; the third-party data collection is the AdMob advertising, the Firebase crash reporting and the usage statistics described above.
A future update may add optional accounts (email or Google sign-in) with online leaderboards. If and when that ships, this policy will be updated first to describe exactly what would be collected (email address, chosen display name, and puzzle scores) and how to delete it. Nothing in the current version creates an account or uploads your data.
Everything this app stores on your device can be erased in one step: Me → Privacy → Delete all app data removes scores, medals, daily-challenge history, your profile, every preference and any game in progress. Uninstalling the app does the same.
Crash reports are different, and we would rather say so plainly. Firebase Crashlytics keeps them for 90 days and then deletes them. A report carries nothing that identifies you, so we have no way to find yours among others and delete it sooner; it is removed on that schedule along with everything else.
The one thing that is not ours to delete is the advertising identifier used by AdMob, which Android controls — you can reset or delete it in Settings → Privacy → Ads, as described above.
Whizkid World LLP. Questions or requests about this policy: whizkidworldllp@gmail.com
We may update this policy as the app evolves. Material changes will be reflected on this page with an updated effective date.