Check Wall · Last updated: October 28, 2026
Check Wall collects only what it needs to run the game, show ads to free players, process optional subscriptions, and power online play and leaderboards. We do not sell your personal information.
Settings (theme, sound), tutorial progress, campaign levels and stars, win streaks and your ad-free status are stored locally on your device.
When you open the App we create an anonymous guest account with Firebase Authentication (a random identifier, no personal details). If you choose to sign in with Google, Apple or email, we receive your account identifier, email address and display name from that provider. Signing in keeps your guest progress.
For signed-in players we store a public profile — username, online rating, wins and losses, campaign progress and a country flag — which other players can see on the leaderboard and in online matches. Your country is set from the country code of your phone’s SIM card or mobile network, or otherwise its time zone or region setting (we do not use GPS or your precise location; only the two-letter country code is used), and you can change it at any time in Profile. If you send a friend request, we store it (your username and flag, and the player you asked) until they accept or decline it or you cancel it. When a request is accepted, each of you is added to the other’s friends list (player ID, username and flag) so you can challenge each other; only you can see your list, and removing a friend removes you from each other’s lists. Friend challenges (who sent it, to whom, and the room code) are stored briefly and deleted when answered or after a few minutes. We also store whether you have an active Remove Ads subscription.
Online games store the match state, room code, both players' usernames, ratings and country flags, whether each player is connected, preset emoji reactions sent during the match, and rematch offers. This is used to run the match and is not used for advertising.
Free players see ads from Google AdMob. AdMob may collect device identifiers (such as the Android advertising ID), IP address, and ad interaction data to serve, measure and personalise ads and prevent fraud. In the EEA, UK and other regions where required, we ask for your consent first; you can change your choice any time in Profile → Settings → Ad privacy choices. You can also reset or delete your advertising ID in your device settings. See Google's policy: https://policies.google.com/technologies/partner-sites
Subscriptions are processed by Google Play or the App Store. We never see your payment card details; we receive a purchase record (product, purchase token and status) to unlock ad-free play.
To run the game and online matches, show leaderboards, sync progress across your devices, provide ad-free access, serve ads to free players, prevent cheating and abuse, and fix problems.
Data is processed by our service providers Google (Firebase, AdMob, Google Play) and Apple, under their own privacy terms. Your username and game statistics are visible to other players. We may disclose information if required by law.
Your data is kept while your account exists. Delete your account in Profile → Account → Delete account to remove your profile, username, leaderboard entry and ad-free record; local data is removed when you uninstall the App. You can also request deletion using the contact below.
Check Wall is a general-audience game and is not directed at children under 13 (or the minimum age in your country). We do not knowingly collect personal information from children. If you believe a child has provided personal information, contact us and we will delete it.
Depending on where you live (for example under the GDPR or CCPA) you may have the right to access, correct, delete or export your data and to object to certain processing. Contact us to exercise these rights.
Data is transmitted over encrypted connections and protected by Firebase security rules, but no system is completely secure.
We may update this policy; the "Last updated" date shows the latest version.